1991 Mercedes-Benz 300SL Spark Plugs

Essential 1991 Mercedes-Benz 300SL Spark Plugs

E3 – DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (Part No.E3.48)

DiamondFIRE Automotive Spark Plug: More Power, Saves Gas

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$6.99
The Spark Plugs are the product of years of fundamental research in the combustion field. The unique patented electrode configuration of these new The spark plugs increases the amount of combustion pressure created during each power stroke of an engine, which results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines. E3.48 is a 14mm, 0.750 reach plug with a gasket seat. It fits a wide variety of late model applications, especially import. E3.48 is widely stocked in automotive retail stores. The automotive plugs have three legs securing the Diamond FIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented Diamond FIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.

Product Features:
  • E3’s Diamond Fire edge to edge ground electrode provides maximum performance with increased efficiency and a faster more complete burn.
  • Smoother Acceleration & Idle – The faster flame initiated by the The spark plug results in a more complete burn of the ingested fuel charge. More pressure is created against the piston more fuel is put to work
  • Energy – Power output improved up to 6% on average in the typical operating ranges. Results will vary.
  • Efficiency – The “diamond shaped” side wire electrode projects the combustion spark in a way that more quickly ignites the air/fuel mixture, thereby creating a significantly faster and larger flame kernel. The result is that more fuel is put to work durin
  • E3’s patented Diamond Fire Technology provides a cleaner burning combustion, which translates into fuel savings and reduced engine carbon deposits
  • The Spark Plugs are pre-gapped at the factory and cannot be adjusted.
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ACDelco – Spark Plug (Part No.R42XLS)

Spark Plug

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$4.99
ACDelco Professional Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.

Product Features:
  • Black Onyx coating helps reduce corrosion
  • Copper core provides great heat transfer and helps maximize plug durability
  • Ribbed suppressor seal extends resistance and helps prevent spark ‘flash over’ and misfires
  • Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
  • Available for use in Marine applications
  • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
  • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
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Champion – Champion Copper Plus- Single Card – RC12YC (Part No.71-1)

Champion Copper Plus- Single Card - RC12YC

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$4.99
Dependable performance. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.

Product Features:
  • Copper Plus – Dependable Performance.
  • Copper core center electrode allows for accurate control of heat range for longer life
  • Patented TinTac and ULTRASEAL coated shell for maximum corrosion resistance
  • Patented SAC-9 semiconductor resistor for maximum EMI & RFI suppression
  • Built to ISO and SAE standards for proven performance
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DENSO – Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IW20 (Part No.5306)

Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IW20

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$10.99
Increased performance with World’s smallest Iridium Center Eletrode (0.4mm).

Product Features:
  • World’s smallest Iridium Center Electrode (0.4mm) for improved spark for maximum combustion
  • Patented 360-degree laser welding assembly process
  • U-groove and taper cut ground electrode to maximize flame propagation.
  • Withstands temperatures greater than 4000¦ Fahrenheit
  • Burnished nickel plating for high temperature endurance and superior corrosion resistance
  • Wide range of part numbers for thousands of applications, including classic and collector cars
  • Iridium Power
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Champion – Iridium Spark Plug: Maximum Performance, OE Replacement, RC12WYPB4 (Part No.9201)

Iridium Spark Plug: Maximum Performance, OE Replacement, RC12WYPB4

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$8.49
Champion® Iridium – the ultimate element. This spark plug’s fine-wire iridium center and platinum ground electrodes provide the sharpest spark focus for maximum performance.

Product Features:
  • Champion Iridium – Maximum Performance. Premium Spark Plug
  • Iridium center electrode delivers maximum life
  • Fine-wire center electrode and V-trimmed for greater ignitability
  • V-trimmed ground electrode promotes sharper spark focus
  • Maintains stable operating temperature under all engine loads
  • Heat-Active™ alloy allows electrodes to reach optimal temperature quickly
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Champion – Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RC11PYPB4 (Part No.7070)

Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RC11PYPB4

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$5.79
Champion® Double Platinum Power¿ spark plugs deliver more powerful performance. Featuring exclusive Heat-Active¿ alloy, platinum fine wire center electrode and platinum pad ground electrode provide maximum life and sharper spark focus.

Product Features:
  • Double Platinum Power – Premium Spark Plug. More Powerful Performance.
  • Platinum center and ground electrode for greater wear resistance
  • Maintains stable operating temperature under all engine loads
  • Fine-wire center electrode for greater ignitability
  • V-trimmed ground electrode promotes sharper spark focus
  • Heat-Active┐ alloy allows electrodes to reach optimal temperature
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DENSO – PQ16TT Platinum TT Spark Plug (Part No.4507)

PQ16TT Platinum TT Spark Plug

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$4.79
Twin-Tip design enables faster flame propagation for more complete combustion.
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Autolite – Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration (Part No.3926)

Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration

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$3.49
Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Double Platinum spark plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires and increases durability of the plug. Consider upgrading to Autolite Iridium XP spark plugs for increased performance.

Product Features:
  • Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
  • Multi-rib insulator reduces danger of “flash-over”
  • One-piece terminal post adds strength
  • Resistor reduces radio frequency interference (RFI) and electrode erosion
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Motorcraft – SPARK PLUG (Part No.SP-424-X)

SPARK PLUG

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$8.29
SPARK PLUG

Beru – Ignition Wire (Part No.F1030380899BER)

Ignition Wire

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$12.20
Ignition Wire

Dorman – Help – Spark Plug Non-Foulers – 14mm Gasket Seat Long Reach (Part No.42004)

Spark Plug Non-Foulers - 14mm Gasket Seat Long Reach

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$9.99
This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this spark plug non fouler is designed for easy installation to protect spark plugs from fouling and damage on specified vehicles
  • Ideal solution – this non-fouler preserves spark plug life and is a reliable replacement for an original non-fouler that has failed due to corrosion
  • Durable construction – made from quality components to ensure reliable performance and a 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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1991 Mercedes-Benz 300SL Spark Plugs

Maybe you’re in the middle of a full rebuild of that 1991 Mercedes-Benz 300SL. Maybe you just need a couple of Spark Plugs. Either way, Advance Auto Parts has 22 different Spark Plugs in our inventory ranging from $2.29 to $12.20. That means you can find the exact parts or products you need to keep that 1991 Mercedes-Benz 300SL running smoothly.

Spark Plugs are only as good as their brand. We stock 10 different brands to make sure you have plenty of trusted parts to choose from for your 1991 Mercedes-Benz 300SL. Champion, E3, and NGK 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 Spark Plugs for your 1991 Mercedes-Benz 300SL, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 604 reviews in this category, some of the top rated parts include Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration with 4.7 stars and Iridium IX Spark Plug: Single Iridium Fine Wire, BKR5EIX with 4.9 stars.

So if you’re in the market for aftermarket Spark Plugs to keep your 1991 Mercedes-Benz 300SL 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!

Spark Plugs Brands To Make Your 1991 Mercedes-Benz 300SL Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1991 Mercedes-Benz 300SL demands trusted brand parts and products to keep it running. Many trusted brands of Spark Plugs make up Advance Auto Parts’ inventory, and all are ready to help make your 300SL the best it can be. Be sure to browse some of our top Spark Plugs brands and parts.

Popular ACDelco Spark Plugs

We carry ACDelco parts in our stock across Spark Plugs categories, plus more. For a 1991 Mercedes-Benz 300SL, our most popular ACDelco Spark Plugs include:
Double Platinum Spark Plug
from $9.79
(1)
Double Platinum Spark Plug
Spark Plugs

FAQs for 1991 Mercedes-Benz 300SL Spark Plugs

What are the most purchased Spark Plugs for the 1991 Mercedes-Benz 300SL?

Out of 22 Spark Plugs for the 1991 Mercedes-Benz 300SL, the most popular in our inventory are:

What are the top-rated 1991 Mercedes-Benz 300SL Spark Plugs?

Top-rated Spark Plugs for your 1991 Mercedes-Benz 300SL based on customer reviews/ratings are:
Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration
from $3.49
(20)
Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration
“Updated plug new coating, grea value”
Iridium IX Spark Plug: Single Iridium Fine Wire, BKR5EIX
from $11.99
(12)
Iridium IX Spark Plug: Single Iridium Fine Wire, BKR5EIX
“Perfect fit for my 2008 Outlander. I changed the original plugs at 140,000. Easy install too! Saved ton of money DIY. These plugs will go about 50”
OE Series Standard Nickel Spark Plug: Conventional Tip Design, BKR5ES
from $4.99
(10)
OE Series Standard Nickel Spark Plug: Conventional Tip Design, BKR5ES
“I have nicknamed it “Sparky.””