Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 5 of 6 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Electrical System. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Power Train. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports1 fire reports1 injury reports
What owners actually said
6 reports
122,000 miles · Oct 30, 2012
Electrical SystemPower TrainFireInjury
I WAS DRIVING MY 1993 MERCEDES TO A GAS STATION IN MY TOWN BEFORE A PLANNED TRIP OF SEVERAL HUNDRED MILES OF OPEN HIGHWAY. I WAS DRIVING ABOUT 15 MPH WHEN THE AUTOMATIC TRANSMISSION STARTED TO MALFUNCTION. I SLOWED DOWN AND TURNED ONTO A SIDE STREET. SMOKE BEGAN POURING OUT FROM UNDER THE TRANSMISSION HUMP SO I TURNED OFF THE IG…
Read full complaint
I WAS DRIVING MY 1993 MERCEDES TO A GAS STATION IN MY TOWN BEFORE A PLANNED TRIP OF SEVERAL HUNDRED MILES OF OPEN HIGHWAY. I WAS DRIVING ABOUT 15 MPH WHEN THE AUTOMATIC TRANSMISSION STARTED TO MALFUNCTION. I SLOWED DOWN AND TURNED ONTO A SIDE STREET. SMOKE BEGAN POURING OUT FROM UNDER THE TRANSMISSION HUMP SO I TURNED OFF THE IGNITION AND RAN TO FIND A FIRE EXTINGUISHER WHILE CALLING 911. POLICE ARRIVED AND KEPT ME AWAY FROM THE CAR, WHICH BURST INTO FLAMES. AFTER THE FIRE DEPARTMENT HOSED IT ALL DOWN THE CAR WAS A TOTAL LOSS AND I WAS VERY SHAKEN UP. I ALREADY KNEW ABOUT THE FAMOUSLY BAD WIRING ON THESE CARS AND WANT OTHERS TO BE WARNED. *TR
NHTSA ODI #10482633
83,000 miles · May 1, 2011
Electrical System
I OWN A WHITE 1992 600SEL WITH 85,000 ORIGINAL MILES. THE CAR'S INTERIOR AND EXTERIOR ARE IN EXCELLENT CONDITION. HOWEVER, THE MAIN WIRING HARNESS IS DISINTEGRATING CAUSING ALL KIND OF ERRATIC ENGINE AND DRIVE-ABILITY BEHAVIOR. THE CAR IS NOT SAFE TO DRIVE AT ALL. IT IS LOOSING POWER, POWER STEERING IS GETTING STIFFER, AND SMELL…
Read full complaint
I OWN A WHITE 1992 600SEL WITH 85,000 ORIGINAL MILES. THE CAR'S INTERIOR AND EXTERIOR ARE IN EXCELLENT CONDITION. HOWEVER, THE MAIN WIRING HARNESS IS DISINTEGRATING CAUSING ALL KIND OF ERRATIC ENGINE AND DRIVE-ABILITY BEHAVIOR. THE CAR IS NOT SAFE TO DRIVE AT ALL. IT IS LOOSING POWER, POWER STEERING IS GETTING STIFFER, AND SMELLS LIKE SULFUR ALL THE TIME. THE LAST TWO DAYS THE CAR IS RUNNING VERY SLUGGISH AND MAKES MERGING INTO TRAFFIC OR JOINING TRAFFIC ON FREEWAYS DANGEROUS AS THE CAR CAN'T GAIN SPEED FAST ENOUGH DUE TO THE HESITATION CAUSED BY THE POORLY AND CHEAPLY DESIGNED MAIN WIRING HARNESS WHICH IS MELTING. I HAD THE CAR INSPECTED BY A MERCEDES MECHANIC WHO HAS BEEN TRYING TO SAVE THE CAR, BUT THE DISINTEGRATION IS SPREADING ALL OVER. HARNESS REPLACEMENT WILL COST $7000 PLUS, PLUS. MERCEDES BENZ MUST ISSUE A RECALL ON SUCH VITAL SAFETY ELEMENT IN THIS CAR. I AM SURPRISED THAT NOTHING HAS BEEN DONE GIVEN OUR COUNTRY'S STUCK STAND ON SAFETY AND WERE NO PRICE CAN EVER PUT ON SAFETY. PLEASE HELP ME WITH THIS. ALREADY REPLACED TWO AIR MASS FLOW SENSORS, COOLANT SENSOR, COILS, CONTROL MODULES, FUEL INJECTOR TOP WIRING HARNESS, AND PLUGS. *TR
NHTSA ODI #10398393
36,000 miles · Jul 8, 2010
Electrical System
MERCEDES BENZ DEALER SAYS THAT MY ENGINE WIRING HARNESS NEEDS TO BE REPLACED DUE TO INSULATION CRACKING ON THE WIRES. THEY STATE THAT ENGINE DAMAGE AND FIRE COULD RESULT FROM THIS DEFECT. IN ADDITION A WARNING LIGHT IS ON WHICH OF COURSE RENDERS THE CAR UNSALEABLE. THEY FURTHER STATE THAT THIS IS SYMPTOMMATIC IN ALL THE AGE C…
Read full complaint
MERCEDES BENZ DEALER SAYS THAT MY ENGINE WIRING HARNESS NEEDS TO BE REPLACED DUE TO INSULATION CRACKING ON THE WIRES. THEY STATE THAT ENGINE DAMAGE AND FIRE COULD RESULT FROM THIS DEFECT. IN ADDITION A WARNING LIGHT IS ON WHICH OF COURSE RENDERS THE CAR UNSALEABLE. THEY FURTHER STATE THAT THIS IS SYMPTOMMATIC IN ALL THE AGE CARS FROM MB. I AM STUCK WITH A CAR THAT MAY CATCH FIRE AND CANNOT BE SOLD! *TR
NHTSA ODI #10342052
115,000 miles · Jun 26, 2008
Electrical System
VEHICLE IS A 1993 MERCEDES BENZ 600SEL. THE ASR (ACCELERATION SLIP CONTROL) WARNING LIGHT APPEARS AFTER THE ENGINE HAS STARTED (USUALLY LESS THAN 10 MINUTES). THE ENGINE SUFFERS LOSS OF POWER AND VEHICLE BECOMES UNDRIVABLE. MERCEDES MECHANIC STATES THE ENGINE HARNESS BODY MOUNTED (PART NO 1405404805) NEEDS TO BE REPLACED. THE WI…
Read full complaint
VEHICLE IS A 1993 MERCEDES BENZ 600SEL. THE ASR (ACCELERATION SLIP CONTROL) WARNING LIGHT APPEARS AFTER THE ENGINE HAS STARTED (USUALLY LESS THAN 10 MINUTES). THE ENGINE SUFFERS LOSS OF POWER AND VEHICLE BECOMES UNDRIVABLE. MERCEDES MECHANIC STATES THE ENGINE HARNESS BODY MOUNTED (PART NO 1405404805) NEEDS TO BE REPLACED. THE WIRING IN THE HARNESS HAS APPARENTLY DEGRATED TO THE POINT WHERE SHORTING IS OCCURRING IN THE ELECTRICAL CIRCUIT(S).MERCEDES WANTS $3600 FOR THE PART ANT $650 FOR LABOR. THIS IS A PART THAT SHOULD NEVER HAVE TO BE REPLACED IN THE FIRST PLACE. REGARDS JACK G DAVIS *TR
NHTSA ODI #10232347
79,452 miles · Mar 15, 2006
Electrical System
1993 MERCEDES BENZ 600 SL - ENGINE MAIN WIRING HARNESS HAS DISINTEGRATED. THIS CAR HAS UNDER 80,000 MILES ON IT. *JB
IF ONE OF THE HEADLAMP WIPER ARMS BECOMES MISALIGNED, THE WIPER BALDE CAN LODGE IN THE GROOVE UNDER THE HEADLAMP. IF THE WASHERS ARE ACTIVATED WITH THE WIPER BLADE IN THE MISALIGNED AND LODGED POSITION, THE WASHER PUMP WILL RUN CONTINUOUSLY EXPELLING ALL AVAILABLE FLUID.
Consequence & remedy
Consequence: PUMP OPERATION IN THE ABSENCE OF FLUID CAN CAUSE THE PUMP TO OVERHEAT AND CAUSE A VEHICLE FIRE.
Remedy: DEALERS WILL REPLACE THE HEADLAMP WASHER PUMP ON THESE VEHICLES.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0
No exact-year investigations in this snapshot.
1993 Mercedes Benz 600 Problems, Complaints & Recalls | Skip That Year