There are 2 stored owner reports matching the fuel system leading-label group for the 2020 Mercedes-Benz GLS-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)TL* THE CONTACT OWNS A 2020 MERCEDES-BENZ GLS450. THE CONTACT STATED SHE NOTICED A FUEL ODOR COMING FROM THE VEHICLE WHEN THE WINDOWS WERE OPEN. THE CONTACT SOUGHT MEDICAL ATTENTION DUE TO BREATHING PROBLEMS. THE VEHICLE WAS TAKEN TO LOCAL DEALER ED HICKS IMPORTS LOCATED AT 3102 S PADRE ISLAND DR, CORPUS CHRISTI, TX 78415 (361) 854-1955, WHERE IT WAS DIAGNOSED THE FIRST TIME WITH A MELTING STICKER ON THE CADILLAC AND IT NEEDING TO BE REMOVED. THE VEHICLE WAS REPAIRED BUT CONTINUE TO EXPERIENCE THE FAILURE. THE CONTACT STATED ON 12/21/2019, WHILE DRIVING 7 MPH, WHEN SHE HEARD MULTIPLE LOUD ABNORMAL NOISES (EXPLOSIONS). THE VEHICLE WAS TAKEN BACK TO THE SAME DEALER, WHERE IT WAS DIAGNOSED THAT THE CADILLAC CONVERTER AND TURBO NEEDED TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. THE MANUFACTURER HAD NOT BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS 1,000.
The fuel rail system failed on the passenger side of the engine and leaks. This is the same issue seen on, but VIN number isn't apart of it: Campaign No. : 2022030003 CA DMV. : 220303 NHTSA ID 21V961 I have taken the vehicle to a Mercedes dealer twice for the concern of smelling gas. The second time I had a video but the service tech couldn't replicate the leak. This safety concern pose a great risk as the gas could come into contact with a hot surface and ignite but passenger at HIGH risk. The problem has taken to the dealer twice with video showing the leak., however they cannot reproduced confirmed/replicate it. No the vehicle or component has not been inspected by the police, insurance representatives or others? But has been taken to the dealership, not the manufacturer. No warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?Just when it leaks there is a strong gas smell as well as a visual of where the leak is coming from.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.