Home · 2025 Mercedes-benz GLS 450 4matic · Complaints

What 7 owners told NHTSA about the 2025 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 (7)Crash / fire / injury (2)Brakes (2)Electrical system (2)Body & structure (1)Driver assistance (1)Engine (1)Engine & cooling (1)Lane Departure (1)Seat belts (1)Steering (1)Suspension (1)

1 of 7 complaints match · Body & structure · clear filters

Nov 13, 2025Visibility & wipersBody & structure1 injury

The contact owns a 2025 Mercedes-Benz GLS450. The contact stated that while driving approximately 50 MPH, a loud popping noise had occurred, and suddenly the panoramic glass sunroof exploded, causing shards of glass to fall into the cabin of the vehicle. During the incident, shards of glass contacted the driver, front seat passenger, and middle row passenger located on the driver's side. The driver sustained lacerations to the left hand and neck, which would require medical treatment. The children were traumatized by the event. The cause of the failure was not determined. The manufacturer and local dealer were notified of the failure. The failure mileage was 10,000.

NHTSA ODI 11699107

Working with the data? Download all 7 complaints as CSV · fetched from NHTSA July 10, 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 2025 Mercedes-benz GLS 450 4matic verdict →