If you own a 2018–2019 Mercedes‑AMG GT, including variants like the Mercedes‑AMG GT R, and you have experienced ignition-coil related misfires,
there is a strong possibility the repair may be covered under a Mercedes-Benz extended emissions warranty that applies to certain vehicles within this model range.

When a coil begins to fail, the engine control unit may register diagnostic trouble codes (DTC) such as:

• P0300 – Random / multiple cylinder misfire
• P0301–P0308 – Misfire detected in specific cylinders

In many cases, drivers first notice the issue when the malfunction indicator lamp (MIL) illuminates, sometimes accompanied by rough idle, hesitation under acceleration, or reduced engine performance.
Because ignition misfires can affect emissions compliance, Mercedes-Benz has issued extended coverage in some cases to address coil-related defects.

For qualifying vehicles, Mercedes-Benz has provided extended emissions warranty coverage of up to 15 years or 150,000 miles (whichever occurs first) for certain ignition-coil related failures.
This extended warranty may cover:

• diagnostic testing
• replacement ignition coils
• associated labor required to correct the misfire condition

Owners who have previously paid out-of-pocket for ignition-coil replacement related to misfire faults may also want to review their repair records and check with an authorized Mercedes-Benz dealer,
as reimbursement programs sometimes accompany emissions-related warranty extensions.

If you currently own a 2018–2019 AMG GT Coupe, GT Roadster, GT S Coupe, GT C Coupe, GT C Roadster, or GT R, and you encounter misfire codes or ignition-coil failures, either now or in the past,
whether you still own the vehicle or not, it is worthwhile to have a Mercedes dealer run your VIN through the factory service system.
This check will confirm whether your specific vehicle falls within the eligibility parameters of the extended emissions coverage.

Here is a list of possible effected models:



Bellow is a PDF of the generic letter sent by MB regarding the extended warranty.

 

I got a spare good coil if anyone needs one...........

 

good info, I ran into this last year, and was very happy it was still covered under warranty (same day replacement too with S class loaner)

the downside is that they only replace the one that fails instead of updating all to new parts, which means if all 4 decide to crap out at separate times, thats 4 trips to the dealer

 

It also appears that 2015–2016 AMG GT models may be affected by the same issue. Refer to the attached PDF for additional details.

 

I think earlier years are MOST affected by the issue, but they have the service bulletin so they can actually replace all coils with new parts.

Unfortunately for newer years, they only extended the warranty so you cannot replace them proactively, only as they fail

 

That’s interesting, because the issue stems from a manufacturing defect, which in theory would affect all four components. So it does raise the question, why not replace all four? (Just a rhetorical question.)