Total Complaints
24 filings
MERCEDES-BENZ 500 · model year
24 NHTSA complaints for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 1993MERCEDES-BENZ500 carries 24 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 1 fire, 1 injury, and 1 fatality. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1993 500 is electrical system:wiring:front underhood with 8 filings, followed by electrical system:wiring (5) and electrical system (4). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 15 investigation files overlapping the 1993 500. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
24 filings
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD | 8 |
| ELECTRICAL SYSTEM:WIRING | 5 |
| ELECTRICAL SYSTEM | 4 |
| POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM) | 1 |
| SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP | 1 |
| SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:PADS | 1 |
| VEHICLE SPEED CONTROL | 1 |
| SEAT BELTS:REAR/OTHER | 1 |
| UNKNOWN OR OTHER | 1 |
| ENGINE AND ENGINE COOLING | 1 |
WIRE HARNESS DEFECT CAUSING SHORT IN SYSTEM SMOKE INSIDE THE VEHICLE WHILE DRIVING ON A COUNTY ROAD IMMEDIATELY PULLED OVER CUTTING OTHER DRIVERS OFF JUST TO GET VEHICLE IN A SAFE AND SECURED LOCATION.
Mileage: 217,000
ENGINE LIGHT ON DUE TO FAULTY ENGINE WIRING HARNESS. MANY ELECTRICAL PROBLEMS, INSULATION CRACKED ALL THROUGHOUT HARNESS. REQUIRES REPLACEMENT!! *TR
Mileage: 89,000
TL* THE CONTACT OWNS A 1993 MERCEDES-BENZ 500 SEL. THE CONTACT STATED THAT THE VEHICLE WOULD STALL SPORADICALLY WITHOUT WARNING. THE VEHICLE WAS TOWED TO A LOCAL MECHANIC WHERE THE CONTACT WAS ADVISED THAT THE VEHICLE HAD OVERHEATED AND CAUSED SEVERAL WIRES TO MELT. THE VEHICLE WAS NOT REPAIRED. NEITHER THE DEALER NOR THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 116,000 AND THE CURRENT MILEAGE WAS 125,000. THE VIN WAS UNAVAILABLE.
Mileage: 116,000
" EXTREMELY DANGEROUS ENGINE WIRE HARNESS " I BELIEVE THE FAULTY WIRE HARNESS COATING WAS MANUFACTURED FROM 1991 TO 1996 BY MERCEDES BENZ. THE PLASTIC COATING THAT PROTECT THE WIRES FROM TOUCHING AS THEY GO TO EIGHT FUEL INJECTORS, COMPLETELY DISSOLVE IN MANY AREAS.....CAUSING A MULTITUDE OF EVENTS: 1) SUDDEN ENGINE FAILURE 2) ENGINE FIRES 3) EXTREME LOSS OF POWER, CAUSING CAR TO JERK INTENSELY WITH THE POWER STEERING GOING IN AND OUT MAKING IT "ALMOST IMPOSSIBLE" TO CONTROL CAR. I HAVE REPLACED THE "ENGINE WIRE HARNESS" ONCE, & NOW NEEDS ANOTHER ON MY 93 MERCEDES 500 SEL WITH 170,000 MILES (THIS WILL BE THE 3RD WIRE HARNESS). (M.B.U..S..A.) IS VERY MUCH AWARE OF THEIR "FAULTY HARNESS" AND HAVE BEEN SENT PICTURES OF CARS BURNED TO THE GROUND, THOUSANDS OF LETTERS AND PICTURES CONSUMERS CONSUMERS, BUT REFUSE TAKE RESPONSIBILITY FOR THIS "DEFECTIVE-PART" ((THEY REFUSE TO RECALL THIS POTENTIALLY DEADLY HARNESS)) THIS PROBLEM IS SO INTENSELY DANGEROUS TO EVERYONE ON A
Mileage: 175,000
WHEN MY 1993 MERCEDES BENZ 500 SEL WARMS TO ITS NORMAL RUNNING TEMP. IT BEGINS TO ACT AS IF IT IS NOT GETTING FUEL. IT CUTS OUT INTENSELY AND THEN DIES OUT COMPLETELY. THIS IS VERY DANGEROUS WHEN PULLING OUT ANYWHERE. I WAS TOLD THAT IT IS THE FUEL INJECTION WIRING HARNESS. WHEN THE CAR FINALLY QUITS COMPLETELY, YOU ARE STRANDED ROADSIDE OF AT LEAST 15 MIN. UNTIL IT WILL START AGAIN. I HAVE BEEN TOLD THAT THIS WIRE HARNESS HAS CAUSED FIRES WHICH HAVE DESTROYED OTHERS WITH THIS SAME DEFECTIVE WIRE COATING. PLEASE HELP US MAKE MERCEDES DO A RECALL, THEY ARE RISKING OUR LIVES! I WAS STRUCK BY A DRIVER WHEN HAVING TO PUSH MY CAR TO THE CURB WHEN STALLING FROM THIS WIRE HARNESS PROBLEM. FORTUNATELY I WAS NOT HIT AT A FASTER SPEED. ALL I RECEIVED WAS SOME MAJOR BRUISING ON MY HIP FROM THE CARS BUMPER. I SUFFERED WITH PAIN FOR OVER A WEEK. I AM NOT FILING FOR GETTING HURT, ONLY TO FIX THIS WELL KNOWN DEFECTIVE COATING ON THE MERCEDES BENZ WIRING HARNESS. PLEASE HELP US WITH OBTAI
Mileage: 170,000
MY MECHANIC TOLD ME ON 11/3/2007 THAT THE WIRE HARNESS ON MY 1993 MERCEDES 500 SEL COULD CAUSE FIRE OR DEATH TO MY FAMILY AND THAT MERCEDES BENZ U.S.A. KNOWS ABOUT THE FAULTS IN THE WIRE HARNESS AND KNOWS THE PEOPLE ARE IN DANGER AND HAVE YET TO DO A RECALL ON YEARS (1992 THROUGH 1996) PLEASE HELP US GET A RECALL IN THE WIRE HARNESS BEFORE PEOPLE GET BURNT OR DIE THESE WIRES JUST FALL APART AND THEN TOUCH EACH OTHER AND THAT IS WHEN THE DANGER STARTS, THIS REALLY IS A SERIOUS AND DANGEROUS SITUATION AND WE ARE ASKING FOR YOUR HELP. THANK YOU! *TR
Mileage: 100,000
MY 500E SEDAN WAS EXPERIENCING ERRATIC THROTTLE CONTROL AND INTERMITTENT STALLING WHILE DRIVING, THUS PLACING ME AT RISK OF NO CONTROL OF THE VEHICLE. *TR AN EXAMINATION OF BOTH THE ENGINE WIRING HARNESS AND THROTTLE-BODY SHOWED DISINTEGRATION OF THE WIRES PROTECTIVE INSULATION. BOTH ITEMS WERE REPLACED AT A COST OF APPROX. $1,900.
1993 MERCEDES BENZ 500SEL WIRING HARNESS FAILURE- INSULATION ON WIRING BECAME BRITTLE AND BEGAN TO FALL OFF. SHORTS IN WIRING LEAD TO TROUBLE LIGHTS COMING ON AND NEEDED TO BE REPLACED. *JB
Mileage: 100,000
1993 MERCEDES BENZ 500E ENGINE WIRING HARNESS INSULATION CANNOT STAND UP TO THE HEAT OF THE ENGINE AND LOSES ITS INSULATION, CREATING AN ENGINE MALFUNCTION AND POSSIBLE FIRE HAZARD.*AK
Mileage: 91,000
1993 MERCEDES 500E WIRING HARNESS DISINTEGRATED. THE IGNITION MODULE WAS ALSO DEFECTIVE *TS THE DEFECTIVE IGNITION MODULE HAS CUT SPARK TO HALF THE CYLINDERS IN THE ENGINE. *NM
SHORTING IN ELECTRICAL SYSTEMS CAUSING FAILURES OF IGNITION AND COMPUTER SYSTEMS INTERMITTENTLY. ROOT CAUSE ANALYSIS SHOW THAT FAILURE OF THE SHEATHING AND MATERIALS OF THE WIRING HARNESSES CAUSE CORRUPTION OF ELECTRICAL CIRCUITS AND REQUIRE COMPLETE REPLACEMENT OF HARNESSES DUE TO POOR QUALITY MATERIALS. *JB
Mileage: 230,040
SHORTING IN ELECTRICAL SYSTEMS CAUSING FAILURES OF IGNITION AND COMPUTER SYSTEMS INTERMITTENTLY. ROOT CAUSE ANALYSIS SHOW THAT FAILURE OF THE SHEATHING AND MATERIALS OF THE WIRING HARNESSES CAUSE CORRUPTION OF ELECTRICAL CIRCUITS AND REQUIRE COMPLETE REPLACEMENT OF HARNESSES DUE TO POOR QUALITY MATERIALS. COMPLETE REPLACEMENT OF THE WIRING HARNESSES WAS COMPLETED IN JULY OF 2005. *JB
Mileage: 198,788
CAR WILL QUIT ALL OF A SUDDEN AND LEAVE ME WITH NO BRAKES AND NO STEERING. THIS IS DUE TO A BRAKE DOWN IN THE ENGINE ELECTRICAL HARNESS. THIS IS GOING TO CAUSE AN ACCIDENT AND OR A FIRE. *NM
Mileage: 134,465
ENGINE WIRING HARNESS DEGRADED AND STARTED BECOMING BRITTLE RESULTING IN WARNING LIGHTS, FAILED WATER TEMPERATURE SENSING AND ULTIMATELY POOR RUNNING OF ENGINE AND WIRING HARNESS CRUMBLING. *NM
Mileage: 74,000
BOTH ENGINE / FUEL INJECTION WIRING HARNESSES OF MY 1993 MERCEDES-BENZ 500E (115,000 MILES), HAVE CRACKED INSULATION THROUGHOUT. THEY ARE SHORTING OUT, CAUSING STALLING AND THE IMPOSITION OF (INVOLUNTARY/UNACCEPTABLE) RISKS OF DANGEROUS ENGINE MALFUNCTIONS AND/OR FIRES INSIDE THE ENGINE COMPARTMENT. NUMEROUS REPORTS OF OTHER MERCEDES-BENZ VEHICLES OF THE SAME AGE DOCUMENT SAID (IDENTICAL) DEFECTS. ALTHOUGH THIS ISSUE IS KNOWN TO MERCEDES-BENZ, A RECALL HAS BEEN REFUSED, OUTRIGHT/HAS YET TO TRANSPIRE. PLEASE ADVISE, ASAP; THANK YOU. *NM
Mileage: 60,000
1993 MERCEDES BENZ 500E - STALLS, ROUGH IDLE AND HESITATION. THE CAR DUE TO WIRING DEFECT SHUTS DOWN DURING DRIVING ACTIVITIES IE. PULLING INTO TRAFFIC AND ALMOST IN A SERIOUS ACCIDENT. THIS WAS REPORTED TO MERCEDES USA AND REPORTED TO DEALERSHIP, THEY STATED UNAWARE OF PROBLEM BUT WOULD REPLACE FOR $1200. PER CLUBS AND USER GROUPS (WWW.500ECSTASY.COM) ALL OWNERS HAVE REPLACED OR EXPERIENCED SAME PROBLEMS. *JB
Mileage: 70,000
MERCEDES BENZ WIRING HARNESS DEFECT.*MR THE CONSUMER STATED THE MANUFACTURER NEEDS TO ACKNOWLEDGE THERE IS A PROBLEM WITH THEIR VEHICLES. *JB UPDATED 08/22/06. *JB UPDATED 12/07/15.*JB
THE ENGINE/FUEL INJECTION WIRING HARNESS OF MY 1993 MERCEDES-BENZ 500E (64,000 MILES), HAS CRACKED INSULATION THROUGHOUT AND IS BEGINNING TO SHORT OUT, WITH THE RISK OF CAUSING DANGEROUS ENGINE MALFUNCTION, AND EVEN FIRE INSIDE MY ENGINE COMPARTMENT. I HAVE READ MANY REPORTS OF OTHER MERCEDES-BENZ CARS OF THE SAME AGE RANGE HAVING THE EXACT SAME ISSUE. THIS IS A KNOW ISSUE WITH MERCEDES THAT THEY REFUSE TO RECALL. *NM
Mileage: 60,000
POSSIBLE ODOMETER TAMPERING. *AK
Mileage: 80,455
REAR SEAT BELT DOES NOT FUNCTION SINCE PURCHASE.
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.