There are 2 owner-reported electrical system complaints for the 2017 Mercedes-Benz S-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I have observed on multiple occasions when the vehicle is brought to a complete stop during driving in traffic, the engine will stall / shut off. When this occurs the engine has to be re-started with the ignition switch to be able to drive the car again. Car does not show any check engine error and Mercedes Benz service claims that they cannot replicate the issue. During the course of driving the car for the past 12000 miles I have observed this issue between 6-8 times. In at least 3 occasions this occurred while driving on the freeway and the traffic came to a sudden halt. Separately the back-up / 360 surround camera system fails occasionally rendering the backup cameras inoperable. Service claims to have performed software updates and parts replacement yet the issue still occurs periodically with no remedy from Mercedes Benz.
STARTING OUT FROM AN INTERSECTION THE ENTIRE ELECTRICAL SYSTEM DIED, NO ENGINE, NO LIGHTS, NO ABILITY TO OPEN TRUNK, NOTHING. I AM REPORTING THIS BECAUSE I FEAR SUCH AN EVENT COULD BE LIFE-THREATENING, EG. IF IT HAPPENED WHILE TRAVELING AT A HIGH SPEED. I BELIEVE THE AIRBAGS MAY HAVE BEEN DISABLED ALONG WITH ALL OTHER ELECTRICAL. DEALER REPORTS THERE WAS A SIMILAR EVENT WITH ANOTHER OF THE SAME CAR ONE WEEK EARLIER, AND THAT IT IS APPARENTLY CAUSED BY A CONTACT FOR THE BATTERY GROUND "BURNING OUT." I BELIEVE THERE SHOULD BE AN URGENT RECALL.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026