2017 Mercedes-Benz GLS 450 Exterior lighting Problems
- Complaints
- 6about this part
- Share
- 17%of 35 total for the year
- Median mileage
- 41,097miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the exterior lighting of the 2017 Mercedes-Benz GLS 450, 17% of the 35 complaints for this model year. Where a mileage was given, the median is 41,097 miles.
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.
“My 2017 mercedes benz gls 450 has standard halogen lighting from the factory. It has very poor visibility in rainy,fog conditions. Also very poor visibility in urban areas where there is partial street lighting. The low bean headlights are too dim to see infront of vehicle. This is very big SUV and feel it is safety hazard to drive with the standard lighting.”
NHTSA complaint #11079108, filed 2018-03, 13,000 miles“The contact owns a 2017 Mercedes-Benz GLS450. The contact heard an abnormal humming sound when the vehicle was started, and the humming sound grew louder over time. The contact believed that the humming sound was coming from the driver's side headlamp. The contact stated that the headlamp was equipped with a small internal fan to dissipate heat. Additionally, other electrical failures were occurring, and the vehicle was taken to a local dealer. The dealer diagnosed the vehicle and determined that the blower motor had failed and needed to be replaced. …”
NHTSA complaint #11710906, filed 2026-01, 135,500 miles“Road visibility is poor with low beam lighting on normal weather condition during nighttime. It increases danger when it rains and/or foggy weather during nighttime.visited dealership and brought up issues, but mbenz can't fix it since it passes its standard. Nhtsa, please do more research on this issue proactively for safety. I believe its a serious problem. This big luxury truck mostly use by families. Keep them safe!”
NHTSA complaint #11103896, filed 2018-06Related service bulletins
- 11031580Apr 16, 2026Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to…
- 11029959Mar 9, 2026Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to…
- 11029062Feb 25, 2026Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky…
- 11029025Feb 24, 2026Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to…
- 11028989Feb 24, 2026Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky…
- 11017500Apr 28, 2025Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky…
- 11017496Apr 28, 2025Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to…
- 11007974Sep 21, 2024Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky…
- 11007753Sep 10, 2024Complaint Headlamp or front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead…
- 11007790Sep 9, 2024Complaint Headlamps fogged or droplets forming. Cause Due to the housing cover with pressure compensation diaphragm, the headlamps are a "closed system". This means that the…
Exterior lighting: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2018 | 1 | 7% |
| 2017 | 6 | 17% |
Other parts of the 2017 Mercedes-Benz GLS 450
8 complaintsEngine
8 complaintsOther or unknown
7 complaintsFuel system
6 complaintsSteering
4 complaintsSeats
2 complaintsBody and structure
2 complaintsSuspension
2 complaintsTransmission and drivetrain
2 complaintsBrakes
1 complaintsForward collision avoidance
1 complaintsSeat belts
1 complaints
← All problems reported for the 2017 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