2025 MERCEDES-BENZ GLC 300 — Complaint #2124948
Open-data reference.
NHTSA Complaint about FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSIST filed August 28, 2025
NHTSA complaint #2124948 (ODI reference 11683653) concerns a 2025 MERCEDES-BENZ GLC 300 and was filed on August 28, 2025. The owner reports the failure occurred on June 11, 2025. The vehicle had 2,000 miles on the odometer at the time of the incident. The report was geocoded to New Jersey based on the filer's self-reported location. The affected component is categorized as forward collision avoidance: dynamic brake support/brake assist, one of NHTSA's standardized taxonomy codes used to group defect patterns across make, model, and year.
The filer flagged the following severity indicators: crash: no, fire: no, injuries: 0, fatalities: 0. No crash, fire, or fatality was associated with this report, which places it in the early-warning stream rather than the priority-review stream. Because a VIN was supplied, this complaint is tied to a specific vehicle and not just a model-year cohort.
Individual complaints are consumer-submitted and unverified by NHTSA engineers — the agency's role at this stage is to collect, index, and make them searchable. What matters for federal action is the pattern: when many owners of the same MERCEDES-BENZ GLC 300 cohort independently describe similar forward collision avoidance: dynamic brake support/brake assist failures, defect investigators have grounds to open a PE and request manufacturer data. Related filings for the same vehicle and component appear below, and the detail page for the full 2025 MERCEDES-BENZ GLC 300 shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2025 Mercedes-Benz GLC300. The contact stated that while driving approximately 30 MPH, there was an abnormal grinding sound coming from the vehicle. The contact stated that the brake assist suddenly activated and the vehicle came to an abrupt stop, causing the seat belt to immediately retract and lock. The contact was slightly jerked from the abrupt stop. The contact stated that a warning light with a red triangle with an image of a crash in the center was illuminated. The contact stated that after starting the vehicle, the infotainment center and the instrument panel were completely black. The vehicle was restarted several times before both systems started operating as needed. The failure occurred twice; however, the second time, the contact had to turn off and restart the vehicle for approximately an hour before the infotainment center and instrument panel became operational. The vehicle was taken to the dealer, who performed a software update for the infotainment
Complaint Details
| NHTSA Complaint ID | 2124948 |
| ODI Number | 11683653 |
| Date Filed | August 28, 2025 |
| Failure Date | June 11, 2025 |
| VIN | W1NKM4HB5SF |
Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.
Read our methodology — how this data is sourced, computed, and verified.