2003 Mercedes-Benz CLK320 Engine Cooling Parts

Keep Your 2003 Mercedes-Benz CLK320 in Top Shape with Quality Engine Cooling Parts

Whether you’re repairing or upgrading your Engine Cooling Part, using high-quality parts is key to keeping your 2003 Mercedes-Benz CLK320 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Water Pumps, Water Pump Gaskets, and Radiators. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Engine Cooling Parts from Trusted Brands

Looking for a reliable Engine Cooling Part? We’ve got you covered with options from brands you know and trust like Carquest Premium and Dorman. For example, Carquest Premium Engine Cooling Parts start at just $19.99 with an average 4.4 star rating. Dorman offer similar pricing and quality, backed by strong customer feedback. With over 50 reviews and a solid 5 star average, you can shop with confidence knowing other Mercedes-Benz CLK320 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2003 Mercedes-Benz CLK320 Engine Cooling Part at Advance Auto Parts is around $138.16, with a range that starts at $4.79 and goes up to $755.99. With 30 options in stock from 7 trusted brands, finding the right fit is easy. Popular picks like Radiator: With Transmission Oil Cooler, Coolant Temperature Sensor 1TS1027, and Engine Water Pump: New, Gasket/Seals Included start at just $27.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Cooling Part, don’t forget to check out other key components like Blower Motor and Related Products and HVAC Electrical Parts. At Advance Auto Parts, we’re here to help you keep your 2003 Mercedes-Benz CLK320 in peak condition, inside and out.

Essential 2003 Mercedes-Benz CLK320 Engine Cooling Parts

Felpro – Engine Coolant Thermostat Housing Seal (Part No.35908)

Engine Coolant Thermostat Housing Seal

from

$4.79
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Carquest Premium – Standard Reservoir Cap: 21 PSI (Part No.10253)

Standard Reservoir Cap: 21 PSI

from

$19.99
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
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URO Parts – Coolant Level Sensor (Part No.2105450024)

Coolant Level Sensor

from

$11.99
URO Parts has been a leading brand of replacement auto parts for European vehicles for more than thirty years. Affordable yet dedicated to quality, URO Parts controls its production process in strict accordance with ISO/TS 16949 QMS specifications and offers a wide variety of components used to restore or repair engine, electrical, drive train, braking, steering, suspension, climate control, cooling, exhaust, and fuel systems in classic to late-model German, British, and Scandinavian vehicles. Looking for parts that are even higher quality than original equipment? URO Parts engineers analyze common failures and identify weaknesses in original equipment parts when creating URO Premium components, which are superior to OE in performance and reliability thanks to improved materials and more robust designs. Thanks to high-quality, competitively-priced URO Parts and bulletproof URO Premium replacement components, owning a prestigious European vehicle is no longer an expensive luxury reserved for the elite and wealthy.

Product Features:
  • Guaranteed fitment
  • Replacement resolves false “low coolant” indicator light warning
  • Replacement resolves failure to warn driver of dangerously low coolant level
  • Direct-fit OE replacement design is easily installed in coolant reservoir tank
  • Easy plug-and-play wiring connection
  • Manufactured using high-quality polymer and corrosion-resistant metal materials to withstand intense cooling system heat
  • Alloy conductors minimize electrical resistance for accurate operation
  • Designed and tested for reliability and long life
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Carquest Premium – Engine Coolant Level Sensor (Part No.FFA1044)

Engine Coolant Level Sensor

from

$20.99
The engine cooling system is critical to engine sustainability under all operating conditions. The Coolant Level Sensor reports the level of coolant either in the radiator overflow container or in the radiator tank.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
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Carquest Premium – New Auxiliary Water Pump (Part No.T1246)

New Auxiliary Water Pump

from

$229.99
This new pump is 100% tested to ensure the highest quality. Each unit is built to meet or exceed all OE specifications and is validated for fit, form, and function. Application specific design to ensure a perfect fit and correct operation for unsurpassed quality.

Product Features:
  • Electric water pump
  • Specialized for vehicles using supplemented cooling for the engine or components
  • Plastic housing
  • All components necessary for installation are supplied with pump
  • Follow all enclosed instructions to maximize pump life and validate warranty
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Dorman – Auxiliary Coolant Pump (Part No.902-067)

Auxiliary Coolant Pump

from

$194.99
This engine auxiliary water pump is designed to match the fit and function of the original pump on specified applications, and is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this engine auxiliary water pump is designed to match the fit and function of the original pump on specified applications
  • Restores functionality – reliable replacement for an original pump that has failed to provide sufficient water flow
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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Dorman – Help – Radiator Drain Cock Screw-In Type With Washer (Part No.61145)

Radiator Drain Cock Screw-In Type With Washer

from

$7.49
This radiator drain petcock is a direct replacement for the original equipment plug that may have deteriorated or corroded. Made of quality materials, this petcock is engineered to strict standards for durable use over time.

Product Features:
  • Direct replacement – this radiator drain petcock matches the fit and function of the original equipment part
  • Durable construction – this part is made of quality materials for a long service life
  • Saves money – offers original equipment quality at a competitive price
  • Quality assured – this petcock has undergone virtual testing to assure proper fit and function
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Rein – Expansion Tank (Part No.EPT0008)

Expansion Tank

from

$48.99
Rein Automotive OE quality expansion tanks, install, fit and perform the way the original manufacturer intended. These tanks are designed to match or exceed the OE materials used and are produced from virgin plastic with no regrind to prevent cracking from heat cycles and ensure the plastic is durable and will have a long service life.

Product Features:
  • Produced from virgin plastic meeting/exceeding OE specifications and ensuring long life
  • Resistant to cracking and wear from heat cycles preventing coolant loss
  • Direct fitment allows easy installation
  • Manufactured to strict engineering standards/specifications in materials and tolerances
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Rein – Expansion Tank (Part No.EPT0001)

Expansion Tank

from

$62.99
Rein Automotive OE quality expansion tanks, install, fit and perform the way the original manufacturer intended. These tanks are designed to match or exceed the OE materials used and are produced from virgin plastic with no regrind to prevent cracking from heat cycles and ensure the plastic is durable and will have a long service life.

Product Features:
  • Produced from virgin plastic meeting/exceeding OE specifications and ensuring long life
  • Resistant to cracking and wear from heat cycles preventing coolant loss
  • Direct fitment allows easy installation
  • Manufactured to strict engineering standards/specifications in materials and tolerances
See More

Rein – Water Pump- Metal Impeller (Part No.WPR0018)

Water Pump- Metal Impeller

from

$126.99
Rein Automotive OE quality water pumps are designed to be direct replacements for OE water pumps and water pump assembles. Rein water pumps are made to original casting specifications to ensure proper fitments for easy installation, proper water flow and maximum cooling. Pumps include the necessary OE style gaskets and/or o-rings to replace the old worn out parts. Seals are made from a high quality silicate carbide compound. Bearings of OE design and materials are also used to meet or exceed OEM standards and ensure long service life. Our quality water pumps aim to provide the professional repair technician and vehicle owner the peace of mind and trust that is expected from an OE quality component. Please read and follow all enclosed instructions to maximize pump life and validate warranty.

Product Features:
  • Pump is produced with silicon carbide seals providing improved durability and service life
  • Pump uses OE designed bearings by ensuring to extend pumps service life
  • Read and follow all enclosed instructions to maximize pump life and to qualify for extended warranty
See More

Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T5100)

Engine Water Pump: New, Gasket/Seals Included

from

$189.99
Carquest Premium drive motor inverter cooler water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, impeller, controller, gaskets, and seals are designed for long-lasting service life. These electric water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium auxiliary water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • Built to meet or exceed OE fit, form and function
  • All components necessary for installation are supplied with pump
  • 100% tested for reliable performance
  • Follow all enclosed instructions to maximize pump life and validate warranty
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Carquest Premium – Coolant Temperature Sensor 1TS1027 (Part No.WTC1075)

Coolant Temperature Sensor 1TS1027

from

$27.99
Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • 100% factory resistance calibrated to ensure precision tolerances, resulting in extremely accurate temperature for optimal performance
  • OE precision matched thermistor ensuring Carquest sensors match OE output resistances across all temperature positions
  • O-rings, seals or thread sealant are included if required
  • Weather-tight connectors prevent leaks and corrosion for longer life
  • Extensive design validation testing and 100% end-of-line tested
  • Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413
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Rein – Temperature Sensor (Part No.ELC0074)

Temperature Sensor

from

$17.99
Rein Automotive OE temperature sensors are made to factory specifications ensuring proper fit, form and function. The temperature sensor is used to report exhaust temperatures to the vehicle’s ECU. The vehicle uses this information to control engine and emission paramaters. Rein temperature sensors include a vehicle specific connector that fits directly into the factory plug. Our quality temperature sensors aim to provide the professional repair technician and vehicle owner the peace of mind and trust that is expected from an OE component.

Product Features:
  • Direct OE replacemet
  • Designed to meet or exceed factory specifications
  • Made using high quality materials
  • Uses vehicle specific style connector for quick replacement.
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Dorman – Radiator Fan Assembly (Part No.620-980)

Radiator Fan Assembly

from

$755.99
This engine cooling fan assembly is precision-engineered to match the fit and performance of the stock radiator fan on specific vehicle years, makes and models. It has been rigorously tested to ensure it cools as effectively as the original part.

Product Features:
  • Ideal replacement – this engine cooling fan assembly was precision-engineered to match the fit and performance of the stock radiator fan assembly on specific vehicles
  • Complete package – assembly is designed with the same materials and components as the original part
  • Quality assured – motors are tested in laboratory settings to ensure performance
  • Cost effective and reliable – trustworthy manufacturing for far less than same part at the dealership
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Rein – RADIATOR MOUNT (Part No.AVM0738)

RADIATOR MOUNT

from

$4.99
Anti-vibration parts dampen vibration harmonics from the engine and drive line components to rest of the vehicle. This in turn reduces vibration and noise which can be felt and heard while the vehicle is in operation. Rein Automotive anti-vibration parts are application specific and match the design and function of the OE parts.

Product Features:
  • Rubber components match the shore hardness of the original equipment bushing to ensure maximum performance and product longevity.
  • Part has a high corrosion resistance for maximum life.
  • Produced with high quality materials to ensure maximum life and a smooth ride.
  • Made by the OE manufacturer.
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Victor Reinz – Engine Water Pump Gasket (Part No.71-14221-00)

Engine Water Pump Gasket

from

$49.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

MAHLE Original – Water Pump Gasket (Part No.K31933)

Water Pump Gasket

from

$7.99
MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.

Product Features:
  • All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
  • MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
  • MAHLE gaskets is the leader in Domestic, Asian and European applications
  • The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
See More

Felpro – Engine Water Pump Gasket (Part No.35910)

Engine Water Pump Gasket

from

$22.49
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Carquest Premium – Integrated Thermostat Housing: With Seal, 192 Degrees (Part No.14569)

Integrated Thermostat Housing: With Seal, 192 Degrees

from

$49.49
Carquest Premium Integrated Housing Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant as well as the design and function of the housing. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
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Carquest Premium – Engine Cooling Fan Module (Part No.WTC2326)

Engine Cooling Fan Module

from

$483.99
The Engine Cooling Fan Module will control the engine cooling fan motor operation based on an input from the engine coolant temperature sensor input or cooling fan switch input.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
  • Where applicable electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
See More

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432540)

Radiator: With Transmission Oil Cooler

from

$348.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432539)

Radiator: With Transmission Oil Cooler

from

$261.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Most Popular Water Pumps for 2003 Mercedes-Benz CLK320s

Enhance your 2003 Mercedes-Benz CLK320 with one of the 4 Water Pumps we have in stock, starting at just $126.99.

Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T5101)

Engine Water Pump: New, Gasket/Seals Included

from

$192.99
Carquest Premium water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, hub, bearings, gaskets and seals are designed for long-lasting service life. These water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • 100% tested for reliable performance
  • Durable housing features precisely machined mounting surface for proper sealing and fitment
  • Equipped with weep chamber or similar feature to help prevent unnecessary replacement
  • Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
  • All gaskets or seals necessary for water pump are included
  • This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
  • This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
  • This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components
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Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T5100)

Engine Water Pump: New, Gasket/Seals Included

from

$189.99
Carquest Premium drive motor inverter cooler water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, impeller, controller, gaskets, and seals are designed for long-lasting service life. These electric water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium auxiliary water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • Built to meet or exceed OE fit, form and function
  • All components necessary for installation are supplied with pump
  • 100% tested for reliable performance
  • Follow all enclosed instructions to maximize pump life and validate warranty
See More

Rein – Water Pump- Metal Impeller (Part No.WPR0018)

Water Pump- Metal Impeller

from

$126.99
Rein Automotive OE quality water pumps are designed to be direct replacements for OE water pumps and water pump assembles. Rein water pumps are made to original casting specifications to ensure proper fitments for easy installation, proper water flow and maximum cooling. Pumps include the necessary OE style gaskets and/or o-rings to replace the old worn out parts. Seals are made from a high quality silicate carbide compound. Bearings of OE design and materials are also used to meet or exceed OEM standards and ensure long service life. Our quality water pumps aim to provide the professional repair technician and vehicle owner the peace of mind and trust that is expected from an OE quality component. Please read and follow all enclosed instructions to maximize pump life and validate warranty.

Product Features:
  • Pump is produced with silicon carbide seals providing improved durability and service life
  • Pump uses OE designed bearings by ensuring to extend pumps service life
  • Read and follow all enclosed instructions to maximize pump life and to qualify for extended warranty
See More

Rein – Water Pump- Metal Impeller (Part No.WPR0017)

Water Pump- Metal Impeller

from

$149.99
Rein Automotive OE quality water pumps are designed to be direct replacements for OE water pumps and water pump assembles. Rein water pumps are made to original casting specifications to ensure proper fitments for easy installation, proper water flow and maximum cooling. Pumps include the necessary OE style gaskets and/or o-rings to replace the old worn out parts. Seals are made from a high quality silicate carbide compound. Bearings of OE design and materials are also used to meet or exceed OEM standards and ensure long service life. Our quality water pumps aim to provide the professional repair technician and vehicle owner the peace of mind and trust that is expected from an OE quality component. Please read and follow all enclosed instructions to maximize pump life and validate warranty.

Product Features:
  • Pump is produced with silicon carbide seals providing improved durability and service life
  • Pump uses OE designed bearings by ensuring to extend pumps service life
  • Read and follow all enclosed instructions to maximize pump life and to qualify for extended warranty
See More

Best-Selling 2003 Mercedes-Benz CLK320 Water Pump Gaskets

Upgrade your CLK320 with one of our 4 best-selling Water Pump Gaskets.

Felpro – Engine Water Pump Gasket (Part No.35910)

Engine Water Pump Gasket

from

$22.49
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Victor Reinz – Engine Water Pump Gasket (Part No.71-14221-00)

Engine Water Pump Gasket

from

$49.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

Victor Reinz – Engine Water Pump Gasket (Part No.71-37221-00)

Engine Water Pump Gasket

from

$16.79
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

MAHLE Original – Water Pump Gasket (Part No.K31933)

Water Pump Gasket

from

$7.99
MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.

Product Features:
  • All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
  • MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
  • MAHLE gaskets is the leader in Domestic, Asian and European applications
  • The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
See More

Top-Quality Radiators for 2003 Mercedes-Benz CLK320s

Choose a high-quality OEM or aftermarket Radiator for Mercedes-Benz CLK320s and enjoy top-notch performance from $261.99.

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432540)

Radiator: With Transmission Oil Cooler

from

$348.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432539)

Radiator: With Transmission Oil Cooler

from

$261.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Our Top Pick for a 2003 Mercedes-Benz CLK320 Thermostat and Water Outlet Assembly

Invest in a durable Thermostat and Water Outlet Assembly for your 2003 Mercedes-Benz, knowing you’re getting trusted brands and expert craftsmanship.

Carquest Premium – Integrated Thermostat Housing: With Seal, 192 Degrees (Part No.14569)

Integrated Thermostat Housing: With Seal, 192 Degrees

from

$49.49
Carquest Premium Integrated Housing Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant as well as the design and function of the housing. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Our Top-Rated Coolant Reservoir Caps for 2003 Mercedes-Benz CLK320s

Make a smart move for your 2003 Mercedes-Benz CLK320 with our Coolant Reservoir Cap for $19.99.

Carquest Premium – Standard Reservoir Cap: 21 PSI (Part No.10253)

Standard Reservoir Cap: 21 PSI

from

$19.99
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
See More

Top-Rated Engine Cooling Part Brands For Your 2003 Mercedes-Benz CLK320

When it comes to finding the perfect Engine Cooling Part for your 2003 Mercedes-Benz CLK320, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 7 trusted brands. We carry the most popular Engine Cooling Part brands including Carquest Premium and Dorman, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $19.99. Purchasing a Engine Cooling Part from us here at Advance Auto Parts is a smart move for both you and your 2003 Mercedes-Benz CLK320, providing peace of mind with parts that meet or exceed OEM standards.

Popular Carquest Premium 2003 Mercedes-Benz CLK320 Engine Cooling Parts

If you’re looking for a top-quality Engine Cooling Part for your 2003 Mercedes-Benz CLK320, Advance Auto Parts has exactly what you need with our selection of Carquest Premium Engine Cooling Parts. We have 3 Carquest Premium Engine Cooling Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $19.99 and an average cost of $87.49, you’ll find the perfect Engine Cooling Part for your needs and budget. Carquest Premium Engine Cooling Parts for the 2003 Mercedes-Benz CLK320 come highly rated, with over 7 customer reviews and an impressive average rating of 4.4 stars. Choosing a Carquest Premium Engine Cooling Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Engine Water Pump: New, Gasket/Seals Included
from $192.99
(1)
Engine Water Pump: New, Gasket/Seals Included
“Perfect fit”
Integrated Thermostat Housing: With Seal, 192 Degrees
from $49.49
(5)
Integrated Thermostat Housing: With Seal, 192 Degrees
“Was boxed as house brand, but actually is a wahler thermostat, a brand I completely trust for my Mercedes. Temp gauge was reading low, and heat was ”
Standard Reservoir Cap: 21 PSI
from $19.99
(1)
Standard Reservoir Cap: 21 PSI
“Works well, looks identical to OEM!”

Top-Quality Dorman 2003 Mercedes-Benz CLK320 Engine Cooling Parts

For those in search of a high-quality Engine Cooling Part for their 2003 Mercedes-Benz CLK320, Advance Auto Parts offers a great selection of Dorman Engine Cooling Parts. With 1 Dorman Engine Cooling Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Engine Cooling Parts start at just $55.99, giving you a range of options to suit your budget. Backed by over 1 customer ratings and an average rating of 4.2 stars, Dorman Engine Cooling Parts provide both reliability and excellent performance. Choosing a Dorman Engine Cooling Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

FAQs for 2003 Mercedes-Benz CLK320 Engine Cooling Parts

What are the best-selling Engine Cooling Parts for 2003 Mercedes-Benz CLK320s?

Out of 30 Engine Cooling Parts that fit 2003 Mercedes-Benz CLK320s, the following parts are the top sellers:

What’s the price range for 2003 Mercedes-Benz CLK320 Engine Cooling Parts?

The prices of Engine Cooling Parts for the 2003 Mercedes-Benz CLK320 range from $4.79 up to $755.99 for the most premium parts.

What is the average price of an Engine Cooling Part for a 2003 Mercedes-Benz CLK320?

The average price for Engine Cooling Parts for the 2003 Mercedes-Benz CLK320 is $138.16. Keep in mind the variety of part types within our Engine Cooling Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Cooling Parts for other Mercedes-Benz CLK320 model years?

Yes, we carry Engine Cooling Parts for 6 model years of Mercedes-Benz CLK320s between 1998 and 2005. The following model years are the most popular for Engine Cooling Part purchases: 2005, 2004, 2002, 2001, 2000, 1999, and 1998.

What are the cheapest Engine Cooling Parts for my 2003 Mercedes-Benz CLK320?

The cheapest 2003 Mercedes-Benz CLK320 Engine Cooling Parts we carry are:

Does Advance Auto Parts sell Engine Cooling Parts for any other 2003 Mercedes-Benz models?

Yes. We stock Engine Cooling Parts for 24 other popular 2003 Mercedes-Benz models. Some of the most popular are 2003 E320 Engine Cooling Parts, 2003 SLK320 Engine Cooling Parts, 2003 S600 Engine Cooling Parts, 2003 SL500 Engine Cooling Parts, and 2003 C230 Engine Cooling Parts.

What are the top-rated Engine Cooling Parts that fit the 2003 Mercedes-Benz CLK320?

The one 2003 Mercedes-Benz CLK320 Engine Cooling Part we have in stock is the Engine Coolant Thermostat Housing Seal. It costs $4.79.

What types of Engine Cooling Parts do you sell for my 2003 Mercedes-Benz CLK320?

As of 11/2/25, these are some of the most in-demand types of Engine Cooling Parts for a 2003 Mercedes-Benz CLK320:

Can I get help with 2003 Mercedes-Benz CLK320 Engine Cooling Part orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercedes-Benz Engine Cooling Parts and more.

What is your return policy for Mercedes-Benz CLK320 Engine Cooling Parts?

Advance Auto Parts keeps returns simple. For new Mercedes-Benz CLK320 Engine Cooling Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.