2018 Mercedes-Benz C 300 structure problems
12 owner complaints filed with NHTSA name the structure on the 2018 Mercedes-Benz C 300 — 12% of all complaints for this model year.
What owners report
“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
“The contact owns a 2018 Mercedes-Benz C300. The contact stated that while driving approximately 60 MPH, a part of the panoramic roof towards the driver's side detached from the vehicle. The contact pulled over to inspect the vehicle. The part was no longer attached, and the contact had to continue…”
filed Aug 19, 2025
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
Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than…
PSL-NCU Return Parts 5/22 · Other · issued May 22, 2026
Structure problems in other C 300 years
| Year | Reports | Share |
|---|---|---|
| 2023 C 300 | 1 | 5% |
| 2022 C 300 | 1 | 4% |
| 2020 C 300 | 3 | 9% |
| 2019 C 300 | 7 | 11% |
| 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.