Home · 2024 Mercedes-benz GLS 450 4matic · Complaints

What 18 owners told NHTSA about the 2024 Mercedes-benz GLS 450 4matic

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (18)Crash / fire / injury (6)Driver assistance (4)Electrical system (4)Engine (2)Visibility & wipers (2)Wheels (2)Body & structure (1)Fuel system (1)Lane Departure (1)Seats (1)Tires (1)

1 of 18 complaints match · Electrical system · crash/fire/injury only · clear filters

Apr 29, 2025Electrical systemEngineFuel systemFire

car spontaneously caught fire while driving, without any warning, with smoke first coming from the air vents followed by smoke from under the bonnet then visible fire engulfing the front of the car, it was serviced 6 weeks prior without any concerning findings on the mechanical or electrical components. 911 was called and fire was extinguished and insurance claim filed, currently being investigated by insurance as to what may have caused the fire.

NHTSA ODI 11657413

Working with the data? Download all 18 complaints as CSV · fetched from NHTSA July 14, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2024 Mercedes-benz GLS 450 4matic verdict →