AI Damage2027 Mercedes-Benz GLC 300: common problems
The maker issued 11 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 11
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 4 |
| Steering | 0 | 0 | 2 |
| Visibility | 0 | 0 | 2 |
| Powertrain | 0 | 0 | 1 |
| Service brakes | 0 | 0 | 1 |
| Structure | 0 | 0 | 1 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Visibility. Wipers, mirrors, defrosters, cracked glass.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- 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 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…
- Complaint During part of the steering movement, it feels heavier or more difficult to steer in the same…
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…
Other years of this model
Questions and answers
What are the most common problems with the 2027 Mercedes-Benz GLC 300?
There are no owner complaints in the NHTSA data for this year; the data comes from 11 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2027 Mercedes-Benz GLC 300?
NHTSA lists 11 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 2027 Mercedes-Benz GLC 300 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 2027 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 2026-11-04.