AI DamageMercedes-Benz AMG GLC43 4matic Coupe: problems, complaints, bulletins
Summary for the Mercedes-Benz AMG GLC43 4matic Coupe across 2 model years: 2 owner complaints and 123 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Electrical system 50% of all complaints
- 2 Powertrain 50% of all complaints
- 3 Engine 50% of all complaints
- 4 Forward collision avoidance 50% of all complaints
- Electrical system: 1 complaints (50% of all); manufacturer bulletins for this component: 125.
- Powertrain: 1 complaints (50% of all); manufacturer bulletins for this component: 24.
- Engine: 1 complaints (50% of all); manufacturer bulletins for this component: 8.
- Forward collision avoidance: 1 complaints (50% of all).
Symptoms owners describe
How many of the 2 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 1 | 0 | 125 |
| Powertrain | 1 | 0 | 24 |
| Engine | 1 | 0 | 8 |
| Forward collision avoidance | 1 | 0 | 0 |
| Steering | 0 | 0 | 16 |
| Visibility | 0 | 0 | 16 |
| Structure | 0 | 0 | 15 |
| Suspension | 0 | 0 | 14 |
| Seats | 0 | 0 | 12 |
| Exterior lighting | 0 | 0 | 8 |
| Backover prevention | 0 | 0 | 6 |
| Service brakes | 0 | 0 | 6 |
| Air bags | 0 | 0 | 2 |
| Lane departure | 0 | 0 | 2 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The vehicle experienced a sudden loss of power while driving on the freeway. The check-engine light began flashing, and the car immediately stopped accelerating. I was in the fast lane at freeway speeds when the vehicle lost power, forcing me to activate my hazard lights and merge into the slow lane to avoid being hit…
The contact stated that while driving approximately 70 MPH, the message "Rear Axle Malfunction" was displayed, and the vehicle stalled. The vehicle was towed to the local dealer who diagnosed the vehicle with a rear axle software malfunction.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Forward collision avoidance. Radar and camera: calibration after bumper or windshield replacement.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- A software update will be performed that provides enhancements to the robustness and system stability of…
- Complaint Clanking noise from the area of the speakers in the doors
- Complaint Slight creaking noises when steering
- Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE
- Complaint Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable…
- Complaint Radio station cover art does not refresh when switching stations
- Complaint Whining / humming noises (described as foghorn‑like) from the drivetrain in the rear axle area…
- Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious…
- Complaint The Apple Music app is no longer available in the head unit apps menu after updating the…
- Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions
- Complaint CEL illuminates and/or AC does not blow cold
- Cause Internal failure of the scroll wheel within the AC compressor
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.