2023 Mercedes-Benz GLS 450 4MATIC Forward collision avoidance Problems
- Complaints
- 2about this part
- Share
- 29%of 7 total for the year
- Median mileage
- —not reported
- Trend
- Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA recorded 2 complaints about the forward collision avoidance of the 2023 Mercedes-Benz GLS 450 4MATIC, 29% of the 7 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The car recently underwent a software update at the dealership for a backup camera issue. When I was driving home on the highway, the car suddenly braked and the seat belts automatically tightened up. This happened 3 additional times on the highway about 5 days later. I had turned off the automatic braking system and it seemed to go away. Then, with the system off, we experienced this again yesterday while on the highway at 70mph. The braking lasts for 1-3 seconds. There is no audible alert or dashboard display. …”
NHTSA complaint #11654449, filed 2025-04“There have been 3 incidents where the car responded to unknown stimuli by braking hard. 3 months ago it happened while making a left turn through an intersection, driving about 10 mph the brakes unexpectedly locked up, luckily the person behind me took evasive action and didn't hit me; 2 weeks later it happened again, I was driving on I-45 attempting to pass slower drivers, the brakes dramatically engaged while I was driving over a slight hill, today it happened again when it mistook a vehicle in a different lane of traffic, and performed a hard brake evasive measure even though there was no…”
NHTSA complaint #11617794, filed 2024-10Related service bulletins
- 11018204May 2, 2025Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane…
- 11005334Jul 15, 2024Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane…
Forward collision avoidance: other model years
Other parts of the 2023 Mercedes-Benz GLS 450 4MATIC
4 complaintsEngine
3 complaintsFuel system
2 complaintsElectrical system
1 complaintsLane departure
1 complaintsOther or unknown
1 complaintsWheels
1 complaints
← All problems reported for the 2023 Mercedes-Benz GLS 450 4MATIC
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology