There are 1 owner-reported body & structure complaints for the 2004 Mercedes-Benz C-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The bonding agent on my roof ( between the glass panel and frame of car) is breaking down- The other week, when I had the sun roof open in direct sun ( my car is usually parked in covered parking) the bonding was sticky to the touch, and got all over my hand when I inspected the rail. I took it to Mercedes, because I thought that it was under recall # 202004011 for this very issue, but they said it was not a covered model. They wanted to charge $300 for an inspection and diagnosis. MBUSA customer service also not interested in investigating whether this issue is affecting my model car. In the recalled models, there is a danger of the glass roof separating from the vehicle.
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 26, 2026