There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2017 Mercedes-Benz S-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)The contact owns a 2017 Mercedes-Benz S550. The contact stated while the vehicle was in for routine maintenance, the mechanic discovered that the front driver's side CV-boot had cracked and was leaking oil. The contact was advised that the CV-boot could cause the front axle to eventually fail. The contact was advised that the front axle needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure, but no assistance was offered. The failure mileage was 76,000.
WHEN PARKING THE CAR. TRANSMISSION IN DRIVE AND FOOT ON BRAKE. WHEN THE IGNITION BUTTON IS PUSHED TO TURN CAR OFF, THE CAR GOES INTO NEUTRAL NOT PARK. THE CAR WILL GO INTO PARK WHEN THE DOOR IS OPENED. THE CAR HAS ROLLED AND CAN CAUSE AN ACCIDENT IF NOT CAREFUL. WAS TOLD THIS IS NORMAL OPERATION WITH THIS MODEL. THINK IT IS UNSAFE. EVERY OTHER CAR I HAVE DRIVEN INCLUDING MERCEDES GO INTO PARK WHEN IGNITION IS PUSHED WITH CAR STOPPED AND FOOT ON BRAKE.
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.