2017 Mercedes-Benz C 300 structure problems
24 owner complaints filed with NHTSA name the structure on the 2017 Mercedes-Benz C 300 — 11% of all complaints for this model year.
What owners report
“The contact owns a 2017 Mercedes-Benz C300. The contact stated that while driving 65 MPH on the highway, the contact heard a popping sound coming from an unknown part of the vehicle. The contact pulled over to the side of the road, exited the vehicle, and became aware that the roof panel had…”
filed Nov 5, 2025
“I am reporting a serious vehicle safety hazard caused by improper and unsafe repair work performed by USA Platinum Motor, located at 1221 California Lane #126B, Arlington, TX. I brought my 2017 Mercedes-Benz C300 in for a cold start rattle with no warning lights or prior issues. The shop diagnosed…”
filed Oct 30, 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, 2026Complaint Damaged cords/tensioning cables at the soft top interior trim with the following characteristics: - Cord/tensioning cable torn - Cord/tensioning cable worn - Cord/tensioning cable torn out - Cord/tensioning…
LI77.30-P-070145 · Service Bulletin/Repair Instructions · issued Apr 28, 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% |
| 2018 C 300 | 12 | 12% |
Other reported problem areas on the 2017 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.