2017 Mercedes-Benz GLC300 electrical system problems

15 owner complaints filed with NHTSA name the electrical system on the 2017 Mercedes-Benz GLC300 — 15% of all complaints for this model year.

Electrical System complaints

15%

share of all complaints

—

median reported incident mileage

0 / 1

crash / fire reports

What owners report

“The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle was able to be restarted. No warning lights were illuminated. The…”
filed Jun 21, 2024
“The last time I drove my vehicle was Monday [XXX] which that day it was raining. I covered my car with my car cover that day because I don't use my vehicle often and being that it was raining I covered it and my vehicle was fine on this day. On Monday [XXX] it was raining as well, I took off my car…”
filed Jan 31, 2024

Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.

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, 2026
Complaint 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, 2026
Complaint 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, 2026

Year	Reports	Share
2016 GLC300	11	8%