Home · 2021 Mercedes-benz GLC Coupe · Complaints
These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.
3 of 61 complaints match · Driver assistance · clear filters
Vehicle will flash warnings on dash the the blind spot assist in inoperative and the front passenger air bag malfunction. The active brake assist is also malfunctioning as the two white cars colliding is on. The dealership as tried to fix this issue 5 times and has tried argue the the active brake assist is functioning normal.
NHTSA ODI 11499353
Driving on I75 in Georgia using Distronic speed control. This system scans highway speed control signage and automatically adjusts the vehicle speed based on speed limit signs. Unfortunately the state of Georgia has deployed MINIMUM SPEED 40 signs alongside the highway that are identical in size and appearance to SPEED LIMIT signage. The next result is the car automatically dropping the current speed (say 70 mph) to 40mph with heart stopping effects, particularly in heavy traffic. Turning off the automatic speed control eliminates the problem. This is a major safety flaw that, left unfixed, will results in loss of life.
NHTSA ODI 11469308
Unexpected Severe braking when changing into turn lane. Unexpected severe braking when approaching intersection with no cars in intersection or on either side of car.
NHTSA ODI 11458518
Working with the data? Download all 61 complaints as CSV · fetched from NHTSA July 20, 2026