There are 4 stored owner reports matching the engine leading-label group for the 2003 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 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)TL* THE CONTACT OWNS A 2003 MERCEDES BENZ S600. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, THE DISTRIBUTION HOSE FAILED. THE VEHICLE WAS TOWED TO THE DEALER WHERE THE CONTACT INQUIRED ABOUT NHTSA CAMPAIGN ID NUMBER: 07V263000 (ENGINE AND ENGINE COOLING) BUT HIS ADVISED THAT HIS VIN WAS NOT INCLUDED IN THE RECALL. THE MANUFACTURER WAS THEN CONTACTED AND CONFIRMED THAT THE VEHICLE WAS NOT UNDER RECALL AND OFFERED NO FURTHER ASSISTANCE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 63,988.
RE: 2003 S600 [XXX] MY RELATIVELY NEW (3000 MILES) S600 HAS A PERSISTENT PROBLEM WITH THE NEW V12 ENGINE THAT HAS NOW DEVELOPED INTO A SERIOUS SAFETY RISK FOR THE DRIVER. MY CAR HAS BEEN IN SERVICE MORE THAN 4 TIMES FOR THIS PROBLEM - IT HAS BEEN ESCALATED TO THE TECH CENTER BY MY DEALER - IT HAS NOT EVER BEEN FIXED. THE SPARK PLUGS ARE REGULARLY FOULED BY MISFIRING CYLINDERS (1,2,7,8) - THE DEALER SAYS IT MAY BE A SOFTWARE PROBLEM THAT MBUSA HAS FAILED TO FIX..AND NOW - WHEN DRIVEN AT SPEED OVER RELATIVELY MODEST BUMPS - THE CAR TOTALLY DIES AND ALL POWER IS GONE...THE SRS LIGHT COMES ON FOR A MOMENT BUT ALL STEERING ON THE CAR IS GONE AND (IF YOU ARE NOT KILLED IN THE MEANTIME) YOU NEED TO STEER THE CAR MANUALLY TO THE SIDE OF THE ROAD AS IT COASTS TO A STOP. THIS IS A DEADLY DRIVING HAZARD - MBUSA IS AWARE OF THIS PROBLEM AND PERMITTING IT TO CONTINUE...YOU HAVE FAILED TO RESPOND TO MY PRIOR WRITTEN MATERIALS INCLUDING THOSE CONTAINED IN YOUR OWN SURVEYS TO ME...THE CAR IS A LEMON AND I WANT A NEW CAR OR WE WILL BEGIN SUIT AS WELL AS STATE AND FEDERAL LEMON AND FRAUD PROCEEDINGS ..WE WILL ALSO FILE A DEMAND WITH NHTSA THAT AN IMMEDIATE RECALL BE REQUIRED OF MBUSA ON ALL S6OO CARS WITH THIS ENGINE... NOTE THIS CYLINDER PROBLEM BEGAN TO APPEAR AT 700 MILES&.IN MARCH, 2003 IT HAPPENED AGAIN IN APRIL, 2003 AT 1000 MILES IT HAS CONTINUED TO OCCUR AND HAS NEVER BEEN FIXED&. IN THE MEANTIME, THE NEW PROBLEM OF THE POWER FAILING ENTIRELY HAS BEEN HAPPENING FOR ABOUT 10 DAYS [XXX] [XXX]. *AK INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
THE ENGINE STALLED 3 TIMES. MODEL S430. *JB ON ONE OCCASION THE SPEED SUDDENLY DROPPED FROM 47-15MPH. SCC
THE GEARS BECAME STUCK, AND THE ENGINE DID NOT SHUT OFF, CONSUMER HAD TO DISCONNECT THE BATTERY TO SHUT OFF THE ENGINE.*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.