Mercedes-Benz Left & Right Ignition Coil Replacement Guide
How to identify the correct side, part number, and fitment before replacing an ignition coil
Replacing an ignition coil on a Mercedes-Benz V12 can be a little different from replacing a coil on a typical four- or six-cylinder engine. When you're working with models such as the Mercedes-Benz S600, CL600, S65 AMG, CL65 AMG, SL600, or SL65 AMG, the ignition system uses components positioned on both sides of the engine.
That creates one important buying question: Do you need the left ignition coil or the right ignition coil?
The two JCarPart products covered in this guide are designed for the left and right positions respectively. Although their fitment ranges overlap, the products are identified by their vehicle-side placement and different manufacturer/interchange numbers. Checking both the side of the vehicle, OE number, engine configuration, and original part before ordering can help prevent an expensive return or installation problem.
Recommended image: show the left and right ignition coils side by side
Left vs. Right Ignition Coil: What's the Difference?
The biggest difference between these two products is not the basic function. Both are ignition coils used to provide the high-voltage ignition needed by the spark plugs. The key difference for the buyer is the specified installation position.
Left Ignition Coil
2001–2014 Mercedes-Benz CL600 and other listed Mercedes-Benz V12 applications. Manufacturer numbers include 2751500780 and A2751500780.
View Left Ignition Coil →Right Ignition Coil
Listed for the same major Mercedes-Benz V12 applications, with vehicle placement specified as Right. Manufacturer numbers include A0040103003 and A2751500480.
View Right Ignition Coil →Mercedes-Benz Models Covered
According to the product fitment information, the two ignition coil listings cover overlapping Mercedes-Benz V12 applications. Always compare your original part number and vehicle configuration before ordering.
2001–2014
2005–2006 / 2008–2014
2001–2013
2006–2013
2004–2009
2005–2009 / 2011
The exact chassis/model codes listed on the product pages include CL600 215.378 / 215.376, CL65 AMG 215.379 / 216.379, S600 220.178 / 220.176, S65 AMG 220.179, SL600 230.476 / 230.477, and SL65 AMG 230.479. Verify your specific vehicle before purchase.
Recommended image: show the two engine-bank positions and identify Left / Right
Common Symptoms of a Failing Ignition Coil
An ignition coil converts the vehicle's electrical power into the high voltage required to ignite the air-fuel mixture. When a coil begins to fail, the engine may develop ignition-related symptoms.
Engine Misfire
A weak or inconsistent ignition signal can cause a cylinder to misfire.
Rough Running
The engine may feel uneven, especially at idle or under acceleration.
Check Engine Light
Ignition-related faults may trigger a check engine light or stored misfire codes.
Poor Performance
A misfiring engine may experience reduced smoothness, response, and power.
How to Choose the Correct Left or Right Coil
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Confirm the vehicle model and year.
Make sure your Mercedes-Benz model and production year appear in the listed fitment. -
Identify the installation side.
Check whether the failed component is on the left or right side of the engine according to the vehicle's service documentation. -
Read the number on your original coil.
Compare the original manufacturer's number with the replacement listing. -
Check the connector and physical design.
Part numbers can have interchange relationships, so physical comparison is useful when several numbers appear in the catalog. -
When in doubt, verify by VIN.
For an expensive V12 ignition component, VIN or professional parts-catalog verification can provide an additional fitment check.
Why Left and Right Matter
It can be tempting to search only for “Mercedes S600 ignition coil” and choose the first matching result. However, these two JCarPart listings demonstrate why that approach can be risky.
Both products cover many of the same Mercedes-Benz V12 applications, but one listing is specifically identified as the Left ignition coil while the other is identified as the Right ignition coil. The manufacturer numbers are also different between the listings.
In other words, matching the vehicle alone is not enough. Before ordering, compare the side, original part number, connector, and physical appearance.
Quick Buying Checklist
- ✓ Mercedes-Benz model and year confirmed
- ✓ Engine/chassis configuration confirmed
- ✓ Left or Right position confirmed
- ✓ Original ignition coil number checked
- ✓ Connector and physical design compared
- ✓ VIN checked if fitment is uncertain
Frequently Asked Questions
Are the left and right ignition coils the same?
They are both ignition coils and their fitment ranges overlap, but the JCarPart listings identify them for different vehicle-side positions and list different manufacturer part numbers. Confirm the original part before ordering.
Can I use the left coil on the right side?
Do not assume that the parts are interchangeable simply because the vehicle fitment is similar. Match the replacement against the original component, specified position, connector, and applicable part number.
Which Mercedes-Benz models use these ignition coils?
The listings include Mercedes-Benz CL600, CL65 AMG, S600, S65 AMG, SL600, and SL65 AMG applications across various model years. Exact chassis and year fitment should be checked before purchase.
What if I am not sure which side I need?
Check the original ignition coil and vehicle service information first. If the part number or side is unclear, provide your VIN and the number on the original component when asking for fitment assistance.
Need a Left or Right Mercedes-Benz Ignition Coil?
Compare the side, part number, and vehicle fitment before ordering.
``` ```Fitment information should be verified against the vehicle, original part number, connector, and VIN when necessary.