There are 2 stored owner reports matching the brakes leading-label group for the 2020 Mercedes-Benz GLS-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)The passenger rear wheel brake caliper lower bolt got loose. The bolt is most likely not available for inspection. The caliper body then started rubbing against the wheel inside surface and caused a noise. If the caliper body had jammed into the wheel and stopped it from rotating, say on the highway, the vehicle could have skidded or rolled over? The MB dealership inspected and replaced the bolt. There were no warning lamps, messages or other symptoms of the problem prior to the failure. The noise came during braking on tuesday, 28 May. The car was repaired by the MB dealership on Thursday, 30 May.
Today around 6:47pm. I was reversing my car and I noticed another car in my backup camera and tried shift the gear shift to drive but it didn't work and stayed stuck on reverse and would not moved and the brake pedal and emergency brake wouldn't work.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.