2021 Mercedes-Benz GLS 450 Lane departure Problems
- Complaints
- 3about this part
- Share
- 10%of 31 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the lane departure of the 2021 Mercedes-Benz GLS 450, 10% of the 31 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.
“On four occasions my car has stalled while in traffic very early in my ownership and then it happened again today with my family in the car and nearly caused an accident. The entire dash lights up with every warning when it happens. Sometimes the check engine light comes on after I shut the car off and restart it. My Mercedes dealer has had it in multiple times for this reason. The last time it was in for this (May of 2022) they reprogrammed the entire car. It happening again today has really made me lose a lot of faith in the vehicle, especially since we purchased it for the safety factors. …”
NHTSA complaint #11500946, filed 2023-01“The contact owns a 2021 Mercedes-Benz GLS450. The contact stated that while driving at various speeds, the Lane Departure safety feature independently activated as he attempted to avoid either a person or an object in the lane of traffic. As the contact attempted to steer around the pedestrian or object in the lane of traffic, the safety feature independently jerked the vehicle back into the lane and into the pedestrian or object he attempted to avoid. …”
NHTSA complaint #11455544, filed 2022-03Related service bulletins
- 11032699May 12, 2026Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5…
- 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…
Lane departure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2021 | 3 | 10% |
Other parts of the 2021 Mercedes-Benz GLS 450
14 complaintsOther or unknown
8 complaintsEngine
3 complaintsForward collision avoidance
2 complaintsSeats
2 complaintsFuel system
1 complaintsSeat belts
1 complaintsSteering
1 complaintsBody and structure
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 Mercedes-Benz GLS 450
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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