ClaimRight · Warranty Denial Guides

Mercedes-Benz AMG C63 warranty claim denied?

175 manufacturer communications on file 4 warranty extensions / campaigns 2010–2021 model years covered

If your warranty claim for your Mercedes-Benz AMG C63 was just denied, you're not alone, and it isn't necessarily the end of the road. Federal records show 175 manufacturer communications filed with NHTSA for this model, including 4 formal warranty extensions and service campaigns covering issues like the rear subframe, where Mercedes-Benz USA extended coverage well beyond the original New Vehicle Limited Warranty. These documents show that some conditions dealers initially deny are later acknowledged by the manufacturer itself once enough owners report them.

A denial letter is often a starting point, not a final answer. Dealers sometimes close claims without referencing all available service bulletins, extended-coverage programs, or documented patterns tied to your specific model and year. Understanding what's actually on file for your vehicle can change how a claim is framed when it's resubmitted.

ClaimRight offers a free assessment of your situation. We review your denial alongside the manufacturer's own published records to identify documentation that may support a second look. There's no cost unless we help you secure a resolution, and no obligation to move forward after your free review.

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What Mercedes-Benz has documented for the AMG C63

Filed with NHTSA by the manufacturer. Warranty extensions are the strongest signal — the manufacturer acknowledging a defect and extending coverage for it.

2023-12-01 · EW-EngineThermSW Warranty extension
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC ("MBUSA") is extending...
Official NHTSA document →
2023-11-03 · ELW-Fuel Filter Warranty extension
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA (“MBUSA”) is exte...
Official NHTSA document →
2023-03-31 · CL-ELWSubframe Warranty extension
Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles...
Official NHTSA document →
2023-03-10 · ELW-RearSubframe Warranty extension
Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles...
Official NHTSA document →
2024-11-27 · OTA - 24P5497813
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-25 C-Class, CLA, EQB, EQE, EQS, G-Class, GLA, GLB, GLC, GLE, GLS, GT, S-Class, and...
Official NHTSA document →
2024-11-25 · LI54.65-P-066284
Complaint The flap of the reversing camera opens and closes by itself during forward travel. This happens several times during the trip. The customer notices the sound of opening a...
Official NHTSA document →
2024-11-20 · LI27.19-P-072588
Complaint Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick test and/or no communication possible with VGS. Cause Transmission...
Official NHTSA document →
2024-11-20 · LI82.85-P-078473
Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital...
Official NHTSA document →
2024-11-13 · LI82.10-P-078069
Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any...
Official NHTSA document →
2024-11-12 · LI27.10-P-075869
Complaint Only vehicles with a variable transfer case are affected. Can be identified through control unit N45 or N15/7 in the quick test When accelerating with light load, vibrati...
Official NHTSA document →
2024-10-23 · LI82.35-P-078467
Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1....
Official NHTSA document →
2024-10-01 · LI27.00-P-074450
Complaint Tension-releasing impact of the propeller shaft with the force-free in D "KID" function, after vehicle has stopped. Cause The tension-releasing jolt in the drivetrain ori...
Official NHTSA document →
2024-09-28 · LI82.70-P-077433
Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during...
Official NHTSA document →
2024-09-21 · LI82.10-P-078307
Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp,...
Official NHTSA document →
2024-09-17 · LI42.10-P-063502
Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions Cause Frictional vibrations Remedy AMG brake systems are designed for high l...
Official NHTSA document →
2024-09-10 · LI82.10-P-078301
Complaint Headlamp or front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to...
Official NHTSA document →
2024-09-10 · LI82.10-P-078302
Complaint Headlamps fogged or droplets forming. Cause Due to its outlet openings, the headlamp is an "open system". This means that acidic gases, moisture, dirt and exhaust gases c...
Official NHTSA document →
2024-09-09 · LI27.00-P-075630
Complaint To insure vehicle down time is kept at a minimum and all required information is available when case is escalated, as well as assist technicians with checks that may help...
Official NHTSA document →
2024-09-09 · LI82.10-P-078304
Complaint Headlamps fogged or droplets forming. Cause Due to the housing cover with pressure compensation diaphragm, the headlamps are a "closed system". This means that the headla...
Official NHTSA document →
2024-08-30 · OTA - 20240830
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-24 C-Class (206 platform), EQE (294 and 296 platform), EQS (295 and 297 p...
Official NHTSA document →
2024-08-10 · NCU - 2022080005
Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) C-Class, E-Class, S-Class, G-Class, CL, CLS, ML, GL, GLE, GL...
Official NHTSA document →
2024-08-09 · CL - 2022080005
In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class, S-Class,...
Official NHTSA document →
2024-06-21 · LI27.00-P-060903
Complaint Complaints about shift quality in vehicles of MODEL 205, 212 and 222 with TRANSMISSION 724.2. Cause If the shift adaptation is not performed as described under "Remedy",...
Official NHTSA document →
2024-06-12 · LI46.35-P-073051
Complaint Noticeable vibrations at the steering wheel: • At speeds between 40mph and 75mph • On straight stretches of road and in long corners • With driver assistance systems swit...
Official NHTSA document →
2024-06-06 · LI82.85-P-070742
Complaint The driver's seat memory settings do not synchronize with the driver's user profile as described in the operator's manual. Driver's seat settings are not transferred to t...
Official NHTSA document →

Common questions

Why would Mercedes-Benz deny a warranty claim on an AMG C63 if there are known issues?
Dealers process claims individually and may not always reference every manufacturer bulletin, extension, or campaign on file. A denial can happen even when related documentation exists elsewhere in NHTSA or manufacturer records. Reviewing what's publicly filed for your specific model year can clarify whether the denial addressed all relevant information available at the time.
What is a warranty extension and does it apply after my claim was denied?
A warranty extension is a manufacturer-issued program that lengthens coverage for a specific part or system beyond the original warranty terms, often announced after patterns of a defect are identified. If one applies to your vehicle's model year and component, it may be relevant even after an initial denial, since extensions are sometimes issued after a first claim was already processed.
Can a denied warranty claim be resubmitted or appealed?
Many manufacturers and dealers allow a claim to be reconsidered, especially when additional documentation, such as a relevant service bulletin or extension, is included. The process and requirements vary by manufacturer and dealership. Gathering supporting records before resubmitting can help ensure the claim is evaluated with full context.
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ClaimRight is a consumer advocacy and document-preparation service. We are not a law firm, do not provide legal advice, and make no promises about the outcome of any individual claim. Bulletin data is sourced from public NHTSA filings and refreshed weekly. All vehicle guides