There are 2 stored owner reports matching the electrical system leading-label group for the 2009 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 2009 Mercedes-Benz S550. The contact stated that while driving at an undisclosed speed with the air condition system activated, there was hot air blowing out of the vents. The contact stated that the hot air was blowing out of the vents and the floorboard was soiled with water. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the compressor and the motherboard needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was taken back to the independent mechanic. The vehicle was diagnosed with electrical wiring failure. The electrical wiring underneath the driver and passenger seats was burned. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline. The failure mileage was approximately 73,000. The VIN was unavailable
TL* THE CONTACT OWNS A 2009 MERCEDES-BENZ S63. THE CONTACT STATED WHILE DRIVING 60 MPH, A BYSTANDER INFORMED HER UNDER THE VEHICLE WAS ON FIRE. THE CONTACT WAS ABLE TO PARK ON SIDE OF THE ROAD. THE CONTACT STATED SHE WAS UNABLE TO OPEN THE FRONT DRIVER SIDE DOOR. THE CONTACT STATED SHE WAS ABLE TO EXIT HER PREGNANT SELF AND HER 4 DOGS THROUGH THE FRONT DRIVER SIDE WINDOW. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE CONTACT STATED SHE DID NOT SUSTAINED INJURIES OR SEEK ANY MEDICAL ATTENTION. THE CONTACT STATED 5 BY STANDERS WHERE ABLE TO EXTINGUISH THE FIRE WITH 5 FIRE HOSES THEY ALL HAD IN HAND. THE POLICE AND FIRE DEPARTMENT FILED A REPORT. THE VEHICLE WAS NOT DRIVABLE. THE VEHICLE WAS TOWED TO AN IMPOUND LOT. A DEALER WAS NOT CONTACTED. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED AS OF YET. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS 71,000. *LN*JB
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.