2018 Mercedes-Benz GLS 450 Other or unknown Problems
- Complaints
- 1about this part
- Share
- 7%of 14 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the other or unknown of the 2018 Mercedes-Benz GLS 450, 7% of the 14 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.
“While driving our 2018 Mercedes GLS 450 down Highway 80 just outside Sacramento, CA, the stationary glass panel of our panoramic sunroof spontaneously explpoded. There was no impact by any outside force, it just shattered with the sound similar to a gunshot. Fortunately I did not lose control of the vehicle, and thankfully the sun shade was closed otherwise broken glass would have showered down into my vehicle. this happened in early evening (around 7:00PM and the ambient temperature was 66 degrees outside, so this had nothing to do with temperature either. …”
NHTSA complaint #11457706, filed 2022-03Related service bulletins
- 11035780Aug 4, 2026Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global supply constraint. 236.17 ATF 1L and 5L…
- 10205835Sep 16, 2021Model series 167 noise on B/C/D pillars.
- 10205154Aug 5, 2016Gasket may settle causing a slight oil leak.
Other or unknown: other model years
Other parts of the 2018 Mercedes-Benz GLS 450
3 complaintsSuspension
3 complaintsElectrical system
2 complaintsEngine
2 complaintsBody and structure
2 complaintsElectronic stability control
1 complaintsExterior lighting
1 complaintsForward collision avoidance
1 complaintsFuel system
1 complaintsSeats
1 complaintsSteering
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2018 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