There are 2 owner-reported tires & wheels complaints for the 2021 Mercedes-Benz GLS-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Both rear wheels on this vehicle have developed cracks which leads to tire pressure loss. Apparently, this is a common issue with Mercedes' heavier vehicles like the GLS and S series sedans. To be clear, I did not hit anything. I did not do any unusual driving. Both rear tires are fine. While you expect that certain components on a vehicle will have problems, it is also reasonable to expect that wheels will not crack prematuraly. Mercedes is aware of the problems. They were named in a class action lawsuit that was dismissed because cars were out of warranty. Warranty or no warranty, this is a major safety issue as a loss in tire pressure can be catastrophic.
Tire Size 270/50 R 20 Tire type: Cooper Discover SRX These tires came with my 2021 Brand new Mercedes GLS 450. I bought this car in May 2021. I have had this car for only 1 1/2 years with 22K miles; tires thread are down to 0. I have kids, and this is my primary family car. I had a few bad to worst experiences during wet weather conditions. I took my car for my 20K service milestone; My Mercedes dealer acknowledged worn-out tire condition; advised me to purchase new tires. They never informed me about warranty replacement. I just got my tires replaced with non- cooper brand. My tire dealer shared the condition of my old tires; it was unbelievingly in horrible/Hazardous condition. See attached images of the tire. These tires should be recalled, as they are unsafe and risky to drive. Thanks, Tarun
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.
Data synced from NHTSA on Apr 25, 2026