There are 3 owner-reported driver assist & adas complaints for the 2020 Mercedes-Benz GLS-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
On a sunny afternoon without zero clouds in the sky, 75 degrees I was driving at 35 mph on a two-lane road with no cars in front of me, behind me, or coming in the other direction, the brakes were urgently and automatically applied and the seat belts dramatically tightened. The system showed a large red X on the screen. It was obvious the automated safety system mistakenly thought we were about to crash into something but there wasn't anything but smooth asphalt.
We intermittently experience phantom braking, including on the highway with no objects or vehicles ahead of us (for example, not on a curve, no vehicle visible within half a kilometer). Vehicle abruptly slows. This includes when in a lane (no lane change). It also can occur during a properly indicated lane change. It occurs when we are driving the posted limit. It also occurs when there are no parallel nearby roads. This appears to be a significant safety issue.
I have received multiple notifications over several months that read "Camera view restricted". This impacts the collision avoidance and adaptive highbeam assist functions. Dealer has offered no service recommendations.
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.
Data synced from NHTSA on Apr 25, 2026