2018 Mercedes-Benz C 300 electrical system problems
10 owner complaints filed with NHTSA name the electrical system on the 2018 Mercedes-Benz C 300 — 10% of all complaints for this model year.
What owners report
“I am wanting to add information to my original complaint. Tracking#11589822 When I called in the electrical issue to AAA the agent said this is a common problem on these cars. Next, I want to add photos the Mercedes of Fresno service department sent me during the 2nd time my car was taken in to be…”
filed Jun 2, 2024
“The contact owns a 2018 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, there was a message was displayed that there was a light bulb malfunction. The contact stated that the rear turn signal lights and brake lights were not operating properly. Additionally, the…”
filed Jan 11, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Please refer to MBUSA's recall report for specific vehicle model detailsCampaign 22V365000 · May 20, 2022
- Mounting bracket for the 12-volt battery may not be securedCampaign 19V586000 · Aug 9, 2019
- Cover for the starter battery may not cover the live positive electrical wire, and in…Campaign 18V725000 · Oct 15, 2018
Related service bulletins
Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The root cause is currently being…
LI00.20-P-080703 · Service Bulletin/Repair Instructions · issued Jun 12, 2026Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the instrument cluster. In addition, the following two…
LI82.85-P-080507 · Service Bulletin/Repair Instructions · issued May 26, 2026Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market vehicles. Cause Before deactivating the…
LI82.85-P-080559 · Service Bulletin/Repair Instructions · issued May 26, 2026Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause…
LI54.65-P-080132 · Service Bulletin/Repair Instructions · issued May 12, 2026
Electrical System problems in other C 300 years
| Year | Reports | Share |
|---|---|---|
| 2023 C 300 | 5 | 23% |
| 2022 C 300 | 7 | 28% |
| 2020 C 300 | 4 | 12% |
| 2019 C 300 | 11 | 17% |
| 2017 C 300 | 31 | 14% |
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.