AI Damage2025 Mercedes-Benz AMG GLC43 4matic Coupe: common problems
Owners of the 2025 Mercedes-Benz AMG GLC43 4matic Coupe filed 2 complaints with NHTSA, most often about electrical system and powertrain. The maker issued 121 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 2
- Technical service bulletins (TSB)
- 121
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: 62.
- Powertrain: 1 complaints (50% of all); manufacturer bulletins for this component: 12.
- Engine: 1 complaints (50% of all); manufacturer bulletins for this component: 4.
- 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 | 62 |
| Powertrain | 1 | 0 | 12 |
| Engine | 1 | 0 | 4 |
| Forward collision avoidance | 1 | 0 | 0 |
| Steering | 0 | 0 | 8 |
| Structure | 0 | 0 | 8 |
| Visibility | 0 | 0 | 8 |
| Suspension | 0 | 0 | 7 |
| Seats | 0 | 0 | 6 |
| Exterior lighting | 0 | 0 | 4 |
| Backover prevention | 0 | 0 | 3 |
| Service brakes | 0 | 0 | 3 |
| Air bags | 0 | 0 | 1 |
| Lane departure | 0 | 0 | 1 |
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.
Comparison
By complaint count this model year ranks 19,879 of 36,656 model years in the NHTSA data (among the 46% least complained about).
On average one model year of the AMG GLC43 4matic Coupe has 1 complaints (2 years in the data). This year has 2, above average.
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…
A software update will be performed that provides enhancements to the robustness and system stability of the communication module. The update is free of charge and runs in the background, which takes about 8 minutes to…
- 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 working towards the speaker and…
- Complaint Slight creaking noises when steering
Cause Noises may come from one or more sleeves of the horn contact plate. Remedy Remove the horn contact plate and check the sleeves for noise; see attached video. If necessary, apply lubricant to the sleeves.
- Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE
Although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. Cause Although the cause of the vibration…
- Complaint Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable…
Complaint Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable Cause OTA Update E61.0 Remedy In the IC Control Unit Log, please check the following information: Verify whether…
- Complaint Radio station cover art does not refresh when switching stations
The UI continues to show the old station’s artwork instead of updating to the new one. Cause When a new station change request is triggered, a temporary glitch is causing the Head Unit application to fail to overwrite…
- Complaint Whining / humming noises (described as foghorn‑like) from the drivetrain in the rear axle area…
Complaint Whining / humming noises (described as foghorn‑like) from the drivetrain in the rear axle area during cornering. (figure 1) On the above‑mentioned vehicles with a mileage up to 15,000 km (about 9,300 mi)…
- Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious…
Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("‑ ‑"). • Flashing when…
- Complaint The Apple Music app is no longer available in the head unit apps menu after updating the…
Complaint The Apple Music app is no longer available in the head unit apps menu after updating the software of the (A26/17 ‑ MBUX multimedia system + instrument cluster (head unit)) to E333.8 / A236 904 19 00. Cause…
- 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 performance under high load and in certain scenarios, can emit noise. Some…
- Complaint CEL illuminates and/or AC does not blow cold
Cause Potentially relevance to hardware and/or software Remedy Scenario 1: 1. If the AC does not blow cold air, replace compressor (if compressor's index and part number Figure 1 match against Table 1). a. If the…
- Cause Internal failure of the scroll wheel within the AC compressor
Remedy Check the compressor's index and part number Figure 1 against Table 1. If listed please perform the following: 1. Replace the compressor, drier, and expansion valve using the applicable WIS instructions. 2…
NHTSA lists 121 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2025 Mercedes-Benz AMG GLC43 4matic Coupe?
Owner complaints to NHTSA most often mention: electrical system, powertrain, engine. Total complaints: 2. The most frequent symptoms in complaint texts: stalls while driving (100%), loss of power / limp mode (50%).
How many service bulletins (TSB) were issued for the 2025 Mercedes-Benz AMG GLC43 4matic Coupe?
NHTSA lists 121 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2025 Mercedes-Benz AMG GLC43 4matic Coupe from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2025 models
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.