2018 Mercedes-Benz C 300 structure problems
14 owner complaints filed with NHTSA name the structure on the 2018 Mercedes-Benz C 300 — 14% of all complaints for this model year.
What owners report
“The contact owns a 2018 Mercedes-Benz C-300. The contact stated that while driving 70 MPH South on the interstate towards Miami, the front panel detached without warning. The contact pulled over to inspect the vehicle and became aware that the panel between the windshield and sunroof had detached…”
filed Aug 26, 2026
“The contact's wife owns a 2018 Mercedes-Benz C300. The contact stated that while washing the vehicle, a part of the panoramic roof started moving while depressing the glass. The contact stated that there was water leaking into the vehicle from the glass. Upon investigation, the contact discovered…”
filed Mar 5, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Please refer to MBUSA's recall report for specific vehicle detailsCampaign 23V854000 · Dec 15, 2023
- Front roof panel located between the windshield and the panoramic sunroof may not have…Campaign 21V197000 · Mar 19, 2021
- Due to a bonding issue introduced in the production process, the rear beltline trim may…Campaign 18V456000 · Jul 10, 2018
Related service bulletins
Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket, handbag etc. Remedy As of the 6th…
LI72.20-P-075746 · Service Bulletin/Repair Instructions · issued Aug 24, 2026Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim…
LI82.62-P-078631 · Service Bulletin/Repair Instructions · issued Aug 6, 2026
Structure problems in other C 300 years
| Year | Reports | Share |
|---|---|---|
| 2023 C 300 | 1 | 5% |
| 2022 C 300 | 1 | 4% |
| 2020 C 300 | 4 | 12% |
| 2019 C 300 | 7 | 10% |
| 2017 C 300 | 24 | 11% |
Other reported problem areas on the 2018 Mercedes-Benz C 300
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.