1978 Mercedes-Benz 300D Air Conditioning Parts

Essential 1978 Mercedes-Benz 300D Air Conditioning Parts

Dorman – 5-Wire Style Relay (Part No.85170)

5-Wire Style Relay

from

$15.99
This HVAC relay connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this HVAC relay connector matches the appearance and function of the factory hardware on specified applications
  • Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
  • 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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Carquest Premium – New Compressor with Clutch, GM R4 Heavy (Part No.T58228)

New Compressor with Clutch, GM R4 Heavy

from

$315.99
High quality OE replacement part with all components needed to complete the job

Product Features:
  • All compressors go through sophisticated testing and leak test processes
  • Includes specific electrical connector to eliminate splicing
  • For ease of installation this compressor includes all gaskets, O-rings or sealing washers needed to repair your car
  • Built in a TS16949 certified manufacturing environment to ensure consistent quality that meets or exceeds OE specifications for fit, form, function, and durability
  • Double lip shaft seal to reduce refrigerant leakage over time requiring less maintenance
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ACM – Air Conditioning Temperature Switch (Part No.R105511825ACM)

Air Conditioning Temperature Switch

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$33.34
ACM is a supplier of Original Equipment quality climate control products. 2 spade terminals on short pigtail.
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Factory Air – Green Round O-Ring (Part No.24610)

Green Round O-Ring

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$0.99
Made from HNBR material; Compatible with R12 And R134A; High quality construction; Universal applications
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Factory Air – Green Round O-Ring (Part No.24615)

Green Round O-Ring

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$1.99
Made from HNBR material; Compatible with R12 And R134A; High quality construction; Universal applications
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Factory Air – Ceramic Shaft Seal Kit (Part No.24016)

Ceramic Shaft Seal Kit

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$21.29
All hardware included; Compatible with R12 And R134A; High quality construction; Universal applications
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Dorman – Electrical Harness – 2-Wire GM A/C Clutch with Diode (Part No.85143)

Electrical Harness - 2-Wire GM A/C Clutch with Diode

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$11.99
This HVAC clutch coil connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this HVAC clutch coil connector matches the appearance and function of the factory hardware on specified applications
  • Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
  • 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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Driveworks – Ball Bearing (Part No.S-907257)

Ball Bearing

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$20.79
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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National – Bearings (Part No.907257)

Bearings

from

$48.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Controlled heat treating process for lasting performance and extended bearing life
  • Industry leading coverage
  • Professional technicians know they can depend on National
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Behr – Air Conditioning Evaporator Temperature Sensor, Without Bracket (Part No.R107137676BEH)

Air Conditioning Evaporator Temperature Sensor, Without Bracket

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$64.09
Air Conditioning Evaporator Temperature Sensor, Without Bracket

Carquest Standard – Reman GM A6 Compressor w/ Clutch (Part No.DW57089)

Reman GM A6 Compressor w/ Clutch

from

$281.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Carquest.

Product Features:
  • Built in a TS16949 certified manufacturing environment to ensure consistent quality that meets or exceeds OE specifications for fit, form, function and durability
  • All remanufactured compressors are built using the latest compressor technology available today and using strict remanufacturing processes
  • All units have new seals, O-rings, gaskets and clutch bearings
  • Tested for noise, vibration, durability, vacuum decay and pressure decay to ensure no leaks and longer life
  • Remanufactured compressors are 100 percent tested to ensure compressor function and noise level meets or exceeds OE specifications
  • Remanufactured compressors come pre-charged with 3 ounces of PAG oil for R134a or R1234yf applications
  • Remanufactured compressors are individually vacuum and pressure tested to ensure no leaks
  • Remanufactured compressors come with the R12/R134A/1234yf required O-rings /sealing washers to install the compressor
  • Remanufactured Compressors are built in a ISO9001:2015 Certified facility to ensure consistent quality standards in the Re-manufacturing process
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Carquest Premium – New Compressor with Clutch, Nippondenso 10PA15C (Part No.T58334)

New Compressor with Clutch, Nippondenso 10PA15C

from

$439.99
Carquest Premium A/C compressors are 100% new units that are manufactured to the highest quality to meet or exceed OE specifications.

Product Features:
  • Every unit is 100% function and leak tested
  • Tested for noise, vibration, durability, vacuum decay and pressure decay to ensure no leaks and longer life
  • Very low friction coating used on swash plate to improve durability
  • PTFE coated pistons improve performance and reduce wear
  • Rubber dampened clutch plate ensures smooth clutch engagement and reduces wear
  • Matched high-quality needle-roller bearing ensures low friction and high load capability
  • Limited Lifetime Warranty when following warranty requirements: Flush A/C System, replace accumulator/receiver dryer, replace orifice tube/expansion device, and filling with correct oil and refrigerant
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Santech – A/C Pressure Switch (Part No.R1054178181SII)

A/C Pressure Switch

from

$18.17
A/C Pressure Switch

ACM – Air Conditioning Temperature Switch (Part No.R105529376ACM)

Air Conditioning Temperature Switch

from

$45.79
ACM is a supplier of Original Equipment quality climate control products. Located on receiver drier for auxiliary cooling fan. Identified by 2 spade terminals on short pigtail with red base.
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Rein – A/C Receiver Drier (Part No.ACD0186R)

A/C Receiver Drier

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$37.99
Rein OE Quality Receiver Drier. If the OES manufacturer fits a high pressure safety valve and or sight glass, the equivalent Rein Automotive Receiver Drier will also be fitted with one. All Rein Automotive Receiver Driers are pressure tested after manufacturing to ensure high quality.
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Carquest Premium – A/C Filter Drier (Part No.T33401)

A/C Filter Drier

from

$28.99
Carquest Accumulators and Receiver Driers are designed to store, filter and dry the air conditioning refrigerant to provide proper performance and durability for the air conditioning system. They are manufactured to meet or exceed original equipment specifications.

Product Features:
  • All parts meet or exceed original equipment standards for moisture absorption, pressure and temperature resistance, air tightness, vibration resistance, corrosiveness, and pulse pressure.
  • Desiccant is 100% tested and assembled in a controlled environment to ensure performance meets or exceeds original equipment standards.
  • All accumulators and receiver driers are helium leak tested prior to packaging.
  • O-Rings necessary for installation are included.
  • O-Rings necessary for installation are included.
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Factory Air – Harness Connector (Part No.37201)

Harness Connector

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$17.49
OE style connectors; Molded plastic construction; Quality contacts ensure proper conductivity; Universal applications
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Factory Air – Reman GM Frigidaire/Harrison A6 Clutch Assembly w/ Coil (Part No.48284)

Reman GM Frigidaire/Harrison A6 Clutch Assembly w/ Coil

from

$119.99
High quality OE replacement part with all components needed to complete the job

Product Features:
  • All mounting hardware included
  • All pulleys and hubs are machined and trued to ensure an even surface
  • Twelve point hub weld
  • Coated to prevent corrosion
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Factory Air – New Nippondenso 10P Clutch Assembly w/ Coil (Part No.47599)

New Nippondenso 10P Clutch Assembly w/ Coil

from

$242.99
High quality OE replacement part with all components needed to complete the job

Product Features:
  • All mounting hardware included
  • Every coil tested for proper ohms
  • Vehicle specific applications
  • Coated to prevent corrosion
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Factory Air – Sealing Washer Kit (Part No.24338)

Sealing Washer Kit

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$5.29
Includes O-Ring; Compatible with R12 And R134A; High quality construction; Universal applications
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Factory Air – Sealing Washer Kit (Part No.24340)

Sealing Washer Kit

from

$9.49
Includes O-Ring; Compatible with R12 And R134A; High quality construction; Universal applications
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Factory Air – Sealing Washer Kit (Part No.24336)

Sealing Washer Kit

from

$12.29
Includes O-Ring; Compatible with R12 And R134A; High quality construction; Universal applications
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Behr – A/C Pressure Switch (Part No.R1054178181BEH)

A/C Pressure Switch

from

$22.52
Behr GmbH & Co. KG, Stuttgart, is a specialist for automotive air conditioning and engine cooling systems, the Behr Group is one of the world’s leading manufacturers and suppliers of Original Equipment cooling and air conditioning products for European passenger and commercial vehicles. 2 bar low pressure and 30 bar high pressure binary switch. This switch is designed to be compatible with R-12 and R134a refrigerants. Located on receiver-drier with 2 spade terminals. Used for compressor cut-out.
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Carquest Premium – A/C Block Type Flange Expansion Valve (Part No.T38750)

A/C Block Type Flange Expansion Valve

from

$39.99
Carquest Expansion Valves are designed to regulate the flow of refrigerant through the air conditioning system to provide optimal cooling to the passenger compartment. Each expansion valve is manufactured to original equipment specifications to perform its function even in the harshest climates. Each part is supplied with the necessary gaskets and o-rings for installation.

Product Features:
  • The bodies of these expansion valves are machined from a single block of aluminum or brass metal.
  • Each expansion valve has settings for tonnage and superheat based on the vehicle specifications.
  • Each expansion valve is tested for function and leakage according to OEM specifications to ensure optimal performance of the air conditioning system.
  • O-Rings necessary for installation are included.
  • O-Rings necessary for installation are included.
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KAI – A/C Expansion Valve, L6 Engine (Part No.ACX011004)

A/C Expansion Valve, L6 Engine

from

$33.99
New Standard Replacement A/C Expansion Valve, L6 Engine

Product Features:
  • L6 Engine
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
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Carquest Premium – A/C Block Type Flange Expansion Valve (Part No.T39210)

A/C Block Type Flange Expansion Valve

from

$29.99
Carquest Expansion Valves are designed to regulate the flow of refrigerant through the air conditioning system to provide optimal cooling to the passenger compartment. Each expansion valve is manufactured to original equipment specifications to perform its function even in the harshest climates. Each part is supplied with the necessary gaskets and o-rings for installation.

Product Features:
  • The bodies of these expansion valves are machined from a single block of aluminum or brass metal.
  • Each expansion valve has settings for tonnage and superheat based on the vehicle specifications.
  • Each expansion valve is tested for function and leakage according to OEM specifications to ensure optimal performance of the air conditioning system.
  • O-Rings necessary for installation are included.
  • O-Rings necessary for installation are included.
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Carquest Premium – A/C Block Type O-Ring Expansion Valve (Part No.T38602)

A/C Block Type O-Ring Expansion Valve

from

$44.99
Carquest Expansion Valves are designed to regulate the flow of refrigerant through the air conditioning system to provide optimal cooling to the passenger compartment. Each expansion valve is manufactured to original equipment specifications to perform its function even in the harshest climates. Each part is supplied with the necessary gaskets and o-rings for installation.

Product Features:
  • The bodies of these expansion valves are machined from a single block of aluminum or brass metal.
  • Each expansion valve has settings for tonnage and superheat based on the vehicle specifications.
  • Each expansion valve is tested for function and leakage according to OEM specifications to ensure optimal performance of the air conditioning system.
  • O-Rings necessary for installation are included.
  • O-Rings necessary for installation are included.
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Carquest Premium – A/C Block Type O-Ring Expansion Valve (Part No.T38881)

A/C Block Type O-Ring Expansion Valve

from

$37.49
Carquest Expansion Valves are designed to regulate the flow of refrigerant through the air conditioning system to provide optimal cooling to the passenger compartment. Each expansion valve is manufactured to original equipment specifications to perform its function even in the harshest climates. Each part is supplied with the necessary gaskets and o-rings for installation.

Product Features:
  • The bodies of these expansion valves are machined from a single block of aluminum or brass metal.
  • Each expansion valve has settings for tonnage and superheat based on the vehicle specifications.
  • Each expansion valve is tested for function and leakage according to OEM specifications to ensure optimal performance of the air conditioning system.
  • O-Rings necessary for installation are included.
  • O-Rings necessary for installation are included.
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1978 Mercedes-Benz 300D Air Conditioning Parts

Maybe you’re in the middle of a full rebuild of that 1978 Mercedes-Benz 300D. Maybe you just need a couple of Air Conditioning Parts. Either way, Advance Auto Parts has 34 different Air Conditioning Parts in our inventory ranging from $0.99 to $471.22. That means you can find the exact parts or products you need to keep that 1978 Mercedes-Benz 300D running smoothly.

Air Conditioning Parts are only as good as their brand. We stock 12 different brands to make sure you have plenty of trusted parts to choose from for your 1978 Mercedes-Benz 300D. Factory Air, Dorman, and Carquest Premium are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Air Conditioning Parts for your 1978 Mercedes-Benz 300D, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 15 reviews in this category, some of the top rated parts include A/C Block Type O-Ring Expansion Valve with 5.0 stars.

So if you’re in the market for aftermarket Air Conditioning Parts to keep your 1978 Mercedes-Benz 300D rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Air Conditioning Parts Brands To Make Your 1978 Mercedes-Benz 300D Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1978 Mercedes-Benz 300D demands trusted brand parts and products to keep it running. Many trusted brands of Air Conditioning Parts make up Advance Auto Parts’ inventory, and all are ready to help make your 300D the best it can be. Be sure to browse some of our top Air Conditioning Parts brands and parts.

Popular Carquest Standard Air Conditioning Parts

We carry Carquest Standard parts in our stock across AC Compressor Without Clutch categories, plus more. For a 1978 Mercedes-Benz 300D, our most popular Carquest Standard Air Conditioning Parts include:
Reman GM R4 Heavy Compressor w/ Clutch
from $219.99
(2)
Reman GM R4 Heavy Compressor w/ Clutch
AC Compressor Without Clutch

FAQs for 1978 Mercedes-Benz 300D Air Conditioning Parts

What are the most purchased Air Conditioning Parts for the 1978 Mercedes-Benz 300D?

Out of 34 Air Conditioning Parts for the 1978 Mercedes-Benz 300D, the most popular in our inventory are:
5-Wire Style Relay
from $15.99
This product is not rated
5-Wire Style Relay
AC Relay Connectors
Green Round O-Ring
from $1.99
This product is not rated
Green Round O-Ring
AC Compressor Seals
Ball Bearing
from $20.79
(4)
Ball Bearing
AC Compressor Thrust Bearings

What are the top-rated 1978 Mercedes-Benz 300D Air Conditioning Parts?

Top-rated Air Conditioning Parts for your 1978 Mercedes-Benz 300D based on customer reviews/ratings are:
A/C Block Type O-Ring Expansion Valve
from $44.99
(1)
A/C Block Type O-Ring Expansion Valve
“The one delegated for 99’s did not have the two mounting holes required by my car. I actually needed the 2000 year model valve. That one worked great.”