Complaints over time
Complaints about the 2021 Mercedes-Benz AMG C63 S by year filed
Owner complaints about this model year, by the year they were filed with NHTSA.
Source: NHTSA ODI complaints file. The lighter column runs through October.
Model year
2021 Mercedes-Benz AMG C63 S
Coupe, gasoline, built in Germany. Owner complaints on file from Aug 4, 2026 to Aug 4, 2026.
Recall campaigns covering this model year4279k vehicles or units across those campaigns
Owner complaints1Below the median 2021 coupe
Severity index0.02021 coupes average 7.5
First 24 months0Complaints in its first two years
Components
100% of complaints about the 2021 Mercedes-Benz AMG C63 S name seat belts
Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls
4 recall campaigns cover the 2021 Mercedes-Benz AMG C63 S
Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.
| Campaign | Filed | Subject | Component | Vehicles | Remedy |
|---|---|---|---|---|---|
| 23V-445 | Jun 26, 2023 | Fuel pump may shutdown, which can result in a loss of drive power | Fuel system | 143,551 | Part replacement |
| 22V-232 | Apr 8, 2022 | Rearview camera may not display the rearview image due to a software error | Back-over prevention | 126,443 | Software update |
| 21V-406 | May 28, 2021 | Rear headrests may be incorrectly mounted to the seatbacks | Seats | 218 | Part replacement |
| 21V-230 | Apr 1, 2021 | Faulty electrical contact within the seat position switch may prevent the driver and passenger air bags and seat belt force limiters from properly… | Airbags | 8,634 | Part replacement |
Source: NHTSA ODI recalls file.
Owner complaints
What owners reported about the 2021 Mercedes-Benz AMG C63 S
The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.
1 complaint on file, page 1 of 1.
- Filed Aug 4, 2026Failure May 31, 2026Atlanta, GASeat belts
Both driver and passenger seatbelts do not fully retract and remain loose. Must be manually guided back into mechanism. I see that there has been a recall for the cabriolet version of this vehicle platform but not for the coupe version. I am unsure why there hasn't also been a recall for the coupe C205 as it is the same platform and having the same exact issue. I have read on forums that there are also other drivers of the coupe platform that also have the same issue with the seatbelts not retracting so this appears to be a common issue with the vehicles safety devices.
NHTSA complaint 11754860
Source: NHTSA ODI complaints file.
Investigations
NHTSA has not opened an investigation on this model year
Source: NHTSA ODI investigations file.
Service bulletins
164 manufacturer communications cover this model year
Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.
- LI42.10-P-063502 Sep 1, 2026 · Service Bulletin/Repair Instructions
Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy The intent of this document is to reduce noise from high performance AMG brakes. AMG brakes are designed for performa… - LI46.35-P-067339 Aug 28, 2026 · Service Bulletin/Repair Instructions
Complaint During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. OR Rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). Complaint does not imp… - CL - Tank Leak Detection Aug 15, 2026 · Warranty Program/Extension
Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA is extending the warranty coverage for the Diagnostic Module for Tank Leakage … - LI72.20-P-075746 Aug 24, 2026 · Service Bulletin/Repair Instructions
Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so… - LI01.20-P-080884 Aug 12, 2026 · Service Bulletin/Repair Instructions
Complaint Oil leaks found on M176 or M177 engines diagnosed to be from the cylinder head cover area Cause Unknown (under investigation) Remedy If oil leaks are found at left or right cylinder head cover area please collect the following information and open… - LI82.85-P-079087 Aug 6, 2026 · Service Bulletin/Repair Instructions
Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP Radio 4.Send2Car 5.Speech Detection Service 6.Navigation 7.iHeartRadio 8.Tra… - LI54.65-P-080132 Aug 12, 2026 · Service Bulletin/Repair Instructions
Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics. Cause Various root causes Remedy See attached di… - LI82.62-P-078631 Aug 6, 2026 · Service Bulletin/Repair Instructions
Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis wor… - LI27.00-P-075630 Aug 5, 2026 · Service Bulletin/Repair Instructions
Complaint This document is intended as a pre-case diagnostic reference for transmission related concerns. It will also ensure that if a case is necessary, all supporting documentation is available. This should not be used on its own as justification for cre… - LI07.10-P-080384 Aug 7, 2026 · Service Bulletin/Repair Instructions
Complaint Customer reports Check Engine Light with possible loss of power concern. The Following DTC's are present • P210185 - The throttle valve actuator has a malfunction. There is a signal above the permissible limit value. • P213500 - The values from th… - LI27.00-P-080840 Aug 4, 2026 · Service Bulletin/Repair Instructions
Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global supply constraint. 236.17 ATF 1L and 5L (PNs: A002989060312 and A002989060313) bottles are out of stock or in limited s… - EW - DMTL Jul 31, 2026 · Warranty Program/Extension
This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below. In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of… - Emissions - 2024100016 Jul 24, 2026 · Emissions
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on certain MY 2019-2021 C-Class, G-Class, GLC, GT, S-Class (205, 463, 253, 190 & 222 platforms) vehicles, the engine control unit software does not correspond to current produ… - LI20.10-P-072886 Jul 24, 2026 · Service Bulletin/Repair Instructions
Complaint Check Engine Light ON with DTC P012800 "The Coolant Temperature is Below the Specified Temperature" active and/or stored in the ME (N3/10). There are no drivability concerns related to this complaint. Cause Root cause varies Remedy Prior to perfor… - LI35.30-P-058566 Jul 14, 2026 · Service Bulletin/Repair Instructions
Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by exp… - PSL-NCU Return Parts 6/19 Jun 19, 2026 · Other
Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, July 9, 2026. After July 9th… - LI00.20-P-080703 Jun 12, 2026 · Service Bulletin/Repair Instructions
Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The root cause is currently being investigated. Remedy To determine the cause, the… - LI82.85-P-080507 May 26, 2026 · Service Bulletin/Repair Instructions
Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the instrument cluster. In addition, the following two conditions are also met: • HERMES (N1… - PSL-NCU Return Parts 5/22 May 22, 2026 · Other
Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, June 11, 2026. After June 11… - LI82.85-P-080559 May 26, 2026 · Service Bulletin/Repair Instructions
Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market vehicles. Cause Before deactivating the HERMES control unit (N112/9), it must be c… - LI82.30-P-059239 May 19, 2026 · Service Bulletin/Repair Instructions
Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chattering, shuddering B: The windshield is not wiped completely (streaking) C: During the downward movement water is pulled … - LI07.10-P-080384 May 18, 2026 · Service Bulletin/Repair Instructions
Complaint Customer reports Check Engine Light with possible loss of power concern. The Following DTC's are present • P210185 - The throttle valve actuator has a malfunction. There is a signal above the permissible limit value. • P213500 - The values from th… - LI40.10-P-061032 May 15, 2026 · Service Bulletin/Repair Instructions
Complaint Noises at the front axle when cornering or maneuvering (video files attached) Note: Save video files locally and play them with Windows Media Player. Cause Driving with summer tires in combination with low outside temperatures. At low outside temp… - PSL-NCU Return Parts 5/15 May 15, 2026 · Other
The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, June 4, 2026. After June 4th, returns of these parts will no… - LI54.65-P-080132 May 12, 2026 · Service Bulletin/Repair Instructions
Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached dia… - LI07.10-P-080384 Apr 28, 2026 · Service Bulletin/Repair Instructions
Complaint Customer reports Check Engine Light with possible loss of power concern. The Following DTC's are present • P210185 - The throttle valve actuator has a malfunction. There is a signal above the permissible limit value. • P213500 - The values from th… - LI77.30-P-070145 Apr 28, 2026 · Service Bulletin/Repair Instructions
Complaint Damaged cords/tensioning cables at the soft top interior trim with the following characteristics: - Cord/tensioning cable torn - Cord/tensioning cable worn - Cord/tensioning cable torn out - Cord/tensioning cable - sheathing damaged Cause High ten… - LI20.10-P-072886 Apr 21, 2026 · Service Bulletin/Repair Instructions
Complaint CEL ON with DTC P012800 "The Coolant Temperature is Below the Specified Temperature" active and stored in the ME (N3/10). There are no drivability concerns related to the complaint. Cause Root cause varies Remedy Prior to performing any repairs fo… - LI82.10-P-078301 Apr 16, 2026 · Service Bulletin/Repair Instructions
Complaint Headlamp, 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 any technical impairment of the headlamp. If a pressure compensation diaphragm… - LI72.40-P-071889 Apr 7, 2026 · Service Bulletin/Repair Instructions
Complaint When closing the door, the side window may remain slightly open (short stroke position). Automatic window raising function of side window inoperative. NOTE: Window is fully operational while holding the switch Cause Software in door control unit (… - LI54.65-P-080132 Mar 9, 2026 · Service Bulletin/Repair Instructions
Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached dia… - LI82.10-P-078301 Mar 9, 2026 · Service Bulletin/Repair Instructions
Complaint Headlamp, 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 any technical impairment of the headlamp. If a pressure compensation diaphragm … - LI54.10-P-073164 Mar 4, 2026 · Service Bulletin/Repair Instructions
Complaint Yellow information message in driver display (instrument cluster): "Switch on motor to charge the 12V battery" Cause The state of charge (SOC) of the 12V battery has dropped to 45% or less. Remedy This warning message appears as soon as the state … - LI54.65-P-080132 Feb 28, 2026 · Service Bulletin/Repair Instructions
Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached dia… - LI82.10-P-078301 Feb 24, 2026 · Service Bulletin/Repair Instructions
Complaint Headlamp, 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 any technical impairment of the headlamp. If a pressure compensation diaphragm … - LI27.19-P-080219 Feb 13, 2026 · Service Bulletin/Repair Instructions
Complaint Check engine light on with the following fault is current in the VGS Control Unit: P084300 Oil pressure sensor 'A' has a short circuit to positive stored in VGS control unit. Cause Electrical failure of oil pressure sensor integrated into VGS Cont… - LI20.10-P-072886 Feb 11, 2026 · Service Bulletin/Repair Instructions
Complaint CEL on with Code P012800 "The Coolant Temperature is Below the Specified Temperature" Cause Under investigation. This is not an issue that affects drivability or performance and is not a safety concern. The vehicle remains safe to operate with thi… - NCU - 2025090001 Feb 13, 2026 · Service Campaign
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the TIREFIT sealant bottle may not meet specifications. The possibility exists that the sealant bottle may leak or may have otherwise been removed… - LI27.10-P-075869 Feb 3, 2026 · Service Bulletin/Repair Instructions
Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load, vibrations or jolting sensation may come from the drivetrain. It may be mistak… - LI54.65-P-080132 Jan 30, 2026 · Service Bulletin/Repair Instructions
Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached dia… - LI83.30-P-079850 Jan 16, 2026 · Service Bulletin/Repair Instructions
Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy *Note - This Li does not apply if there are other Li's that apply to your concern OR you have a fault and/or guided te… - LI83.30-P-079850 Jan 15, 2026 · Service Bulletin/Repair Instructions
Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy AC Diagnosis (General) Initial Steps Verify Customer Concern • Confirm the issue reported by the customer. Compare to … - LI05.20-P-080192 Jan 15, 2026 · Service Bulletin/Repair Instructions
Complaint Customer states check engine light on in the dash. Vehicle has one or more DTC's Present P164B00, P164B09, P2B4400, P005A07, P005C07, P005A09, P005C09, P003C07, P2B5007, P003C09, P2B5009, P34C200, P34C109, P34C800, P34BE00, P34BD09 Cause Software … - LI20.10-P-072886 Jan 6, 2026 · Service Bulletin/Repair Instructions
Complaint CEL on with Code P012800 "The Coolant Temperature is Below the Specified Temperature" Cause Under investigation. This is not an issue that affects drivability or performance and is not a safety concern. The vehicle remains safe to operate with thi… - LI54.65-P-066284 Dec 18, 2025 · Service Bulletin/Repair Instructions
Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. The reversing camera or the 360° system functions normally when activated manually or … - LI27.35-P-080160 Dec 20, 2025 · Service Bulletin/Repair Instructions
Complaint (Original LI document #: LI27.35-P-079039) Clicking noises from the electro-hydraulic control unit (EHS) when the vehicle is stationary and ECO Start/Stop is active (combustion engine is off). The noise is more noticeable outside the vehicle and i… - LI54.65-P-080132 Dec 11, 2025 · Service Bulletin/Repair Instructions
Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached dia… - LI33.30-P-056665 Nov 15, 2025 · Service Bulletin/Repair Instructions
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in attachment Cause If the complaint is eli… - LI27.60-P-079967 Nov 17, 2025 · Service Bulletin/Repair Instructions
Complaint The shift from 1st to 2nd gear may be uncomfortable under light load. Cause Vehicles with engine M264 and transmission 725.0 may be equipped with specific software versions. Remedy Update Transmission Software (VGSNAG3). 1. Perform IPR and update … - LI27.35-P-079971 Nov 10, 2025 · Service Bulletin/Repair Instructions
Complaint Possible complaints about shift quality, issues with learning the park lock, and slipping/rinse entries in the EEPROM or Transmission Health system following the replacement of the below components: - The electrohydraulic control unit (EHS valve b… - LI27.10-P-075869 Nov 3, 2025 · Service Bulletin/Repair Instructions
Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load, vibrations or jolting sensation may come from the drivetrain. It may be mistak… - LI40.10-P-059248 Oct 14, 2025 · Service Bulletin/Repair Instructions
Complaint Crackling and cracking noise from the outer wheel on the front axle when cornering Cause The noise is generated by a micromovement on the contact surface between the rim and the brake disk (wheel bolt group) and may be intensified by potential soi… - LI54.10-P-071499 Sep 25, 2025 · Service Bulletin/Repair Instructions
Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY batt… - LI54.10-P-079772 Sep 16, 2025 · Service Bulletin/Repair Instructions
Complaint After a software update from campaign 2025050001 of component LIB48_222 - G1/3 (48 V on-board electrical system battery) from software release A 000 902 50 48 to software release A 000 902 15 89, the fault code B183319 may be output. B183319 "The … - LI27.19-P-072588 Sep 17, 2025 · Service Bulletin/Repair Instructions
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 control unit Y3/8n4 Remedy For vehicles with 722.9 transmission: Ensure LI54… - LI42.10-P-063502 Aug 1, 2025 · Service Bulletin/Repair Instructions
Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy The intent of this document is to reduce or eliminate noise from high performance AMG brakes. AMG brakes are designed… - LI42.10-P-063502 Jul 25, 2025 · Service Bulletin/Repair Instructions
Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy The intent of this document is to reduce or eliminate noise from high performance AMG brakes. AMG brakes are designed… - LI01.40-P-079518 Jul 16, 2025 · Service Bulletin/Repair Instructions
Complaint Customer complains of oil use, oil leaking or oil smell. Upon inspection oil will be seen at or around the rear of the engine and at the engine/transmission interface. Cause Oil leaking from rear main seal and/or rear main seal plate. Remedy If th… - OTA - 20250627 Jun 28, 2025 · Over The Air
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has updated driver assistance system SCN coding available for certain subject vehicles. The updated SCN coding improves system stability and enhances the availability of driver assistance feature… - LI46.15-P-063353 Jun 9, 2025 · Service Bulletin/Repair Instructions
Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position (e.g. with Easy Entry function), noise (breakaway noise) when leaving the limit stops of the height adjustment. Cause Height adjustment moves to …
Source: NHTSA manufacturer communications files.