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What 26 owners told NHTSA about the 2019 Mercedes-benz GLS

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 (26)Crash / fire / injury (3)Suspension (5)Engine (4)Engine & cooling (4)Electrical system (3)Airbags (2)Backup camera & sensors (2)Body & structure (2)Brakes (2)Steering (2)Fuel system (1)

3 of 26 complaints match · crash/fire/injury only · clear filters

Oct 11, 2025SteeringSuspensionFire

Just financed vehicle from M Auto group nj they sent my vehicle to Mercedes dealer prior to me taking ownership and the dealership advised them of issues with truck they only fixed the water pump . The problem is that same day I drove home ACTIVE CURVE MALFUNCTION and hydraulic fluid is constantly leaking under my hood and on hot turbo on passenger side which is a safety hazard I advised and drove truck back to dealer and they won't talk about fixing issue and I'm financing this truck which is a less than 30 day issue. M Auto group nj dealership was told and not helping I'm scared to drive and this is a known safety hazard

NHTSA ODI 11692845

Oct 18, 2022Engine & coolingFire

The contact's client owns a 2019 Mercedes Ben GLS450. The contact stated that while the owner was driving at an undetermined speed, the vehicle began to smoke and caught fire. There were no warning indicator lights illuminated. There were no injuries or air bag deployment. A police report was filed. The fire department extinguished the fire. The vehicle was towed to an undisclosed location. The local dealer was contacted but the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 31,415.

NHTSA ODI 11489772

Jan 29, 2021Fuel systemAirbagsCrash2 injuries

TL* THE CONTACT OWNED A 2019 MERCEDES-BENZ GLS450. THE CONTACT STATED WHILE HIS WIFE WAS DRIVING 25 MPH, THE VEHICLE CRASHED INTO ANOTHER VEHICLE. THE AIR BAGS FAILED TO DEPLOY. THE DRIVER AND FRONT PASSENGER SUSTAINED INJURIES TO THE HEAD HOWEVER, MEDICAL ATTENTION WAS NOT SOUGHT. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO AN INDEPENDENT AUTO BODY SHOP. THE LOCAL DEALER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 15,000. THE INSURANCE COMPANY DEEMED THE VEHICLE A TOTAL LOSS.

NHTSA ODI 11390663

Working with the data? Download all 26 complaints as CSV · fetched from NHTSA July 20, 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 2019 Mercedes-benz GLS verdict →