NHTSA owner reports · September 18, 2026 snapshot.
Electrical System complaints
31 reportsClear category filter153,000 miles · Jun 20, 2010
Electrical SystemFire
I TURNED ON THE SWITCH OF MY 1994 E320 MERCEDES NOTICED SMOKE COMING FROM UNDER HOOD ON PASSENGER SIDE. OPENED HOOD IT WAS ON FIRE. AIR FLOW SENSOR HAD JUST BEEN REPLACED. I HAVE SINCE REPLACED WIRING HARNESS, PLUGS, BUT CAR IS STILL SURGING NOT IDLING PROPERLY. REPLACED INTAKE AIR SENSOR, PLANNING TO REPLACE IDLE ACTUATOR, AND…
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I TURNED ON THE SWITCH OF MY 1994 E320 MERCEDES NOTICED SMOKE COMING FROM UNDER HOOD ON PASSENGER SIDE. OPENED HOOD IT WAS ON FIRE. AIR FLOW SENSOR HAD JUST BEEN REPLACED. I HAVE SINCE REPLACED WIRING HARNESS, PLUGS, BUT CAR IS STILL SURGING NOT IDLING PROPERLY. REPLACED INTAKE AIR SENSOR, PLANNING TO REPLACE IDLE ACTUATOR, AND OVP RELAY. 153,000 MILES I HAVE SPENT 3000.00. MY SON WAS PRESENT AND PUT OUT THE FIRE AND DISCONNECTED THE BATTERY. I COULD HAVE LOST MY LIFE. I HAVE ALL OLD PARTS REPLACED. *TR
NHTSA ODI #10339207
90,000 miles · Apr 7, 2009
Electrical System
1. POOR ENGINE PERFORMANCE, UNSAFE DRIVABILITY, HESITATION AND STALLING. 2. FREQUENCY OF PROBLEM IS VERY OFTEN. QUALIFIED MERCEDES-BENZ REPAIR SHOP DIAGNOSED ISSUE AS ENGINE WIRING HARNESS INSULATION DEGRADATION. THEY HAVE SEEN A LOT OF THESE HARNESSES FAIL, ACCORDING TO THEIR HEAD MECHANICS. IN CONVERSATIONS WITH MERCEDES-B…
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1. POOR ENGINE PERFORMANCE, UNSAFE DRIVABILITY, HESITATION AND STALLING. 2. FREQUENCY OF PROBLEM IS VERY OFTEN. QUALIFIED MERCEDES-BENZ REPAIR SHOP DIAGNOSED ISSUE AS ENGINE WIRING HARNESS INSULATION DEGRADATION. THEY HAVE SEEN A LOT OF THESE HARNESSES FAIL, ACCORDING TO THEIR HEAD MECHANICS. IN CONVERSATIONS WITH MERCEDES-BENZ DEALER MECHANICS, THEY, TOO, HAVE WITNESSED AN EXTREMELY HIGH FAILURE RATE. 3. ENGINE WIRING HARNESS REPLACED AT A COST OF $1,210.00. *TR
NHTSA ODI #10264371
Mileage unknown · Oct 26, 2008
Electrical SystemEngine And Engine CoolingFireInjury
IN MY 1994 MERCEDES BENZ E320, THE ENGINE WIRING HARNESS HAS COMPLETELY DEGRADED IN SOME PARTS, CAUSING THE INDIVIDUALLY INSULATED WIRES TO TOUCH EACH OTHER, CAUSING SYSTEM MALFUNCTIONS. MY CAR HAS STALLED ON THE FREEWAY SEVERAL TIMES, NEARLY KILLING MYSELF AND ENDANGERING OTHERS. MY FRIEND'S 1995 MERCEDES BENZ E420 HAS CAUGHT O…
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IN MY 1994 MERCEDES BENZ E320, THE ENGINE WIRING HARNESS HAS COMPLETELY DEGRADED IN SOME PARTS, CAUSING THE INDIVIDUALLY INSULATED WIRES TO TOUCH EACH OTHER, CAUSING SYSTEM MALFUNCTIONS. MY CAR HAS STALLED ON THE FREEWAY SEVERAL TIMES, NEARLY KILLING MYSELF AND ENDANGERING OTHERS. MY FRIEND'S 1995 MERCEDES BENZ E420 HAS CAUGHT ON FIRE BECAUSE OF A FAILURE WITH THE ENGINE WIRING HARNESS WHILE WE WERE DRIVING DOWN THE STREET, CAUSING SEVERE BURNS ON HIS UPPER ARMS AND SMOKE INHALATION INJURIES BETWEEN ME, HIM, AND SEVERAL PEDESTRIANS. THIS IS A CRUCIAL SAFETY DEFECT AND I CANNOT FIND ANY RECOURSE VIA MERCEDES BENZ TO REPAIR THIS ISSUE. I AM SCARED TO DRIVE THIS CAR BECAUSE I FEEL THAT I AM A DANGER TO THE SAFETY OF OTHERS AND TO MYSELF. *TR
NHTSA ODI #10246768
Mileage unknown · Sep 8, 2008
Electrical System
CRUMBLING ENGINE WIRING HARNESS IN MY CAR. I'VE COLLECTED AND RESTORED CARS FOR MANY YEARS, AND FIND THIS MANUFACTURING DEFECT TO BE UNBELIEVABLE - ESPECIALLY FROM MERCEDES BENZ. FURTHERMORE THE LACK OF RESPONSE OR RECALL IS FURTHER EVIDENCE THAT MB IS INDIFFERENT ABOUT EXISTING OWNER SATISFACTION, CUSTOMER SAFETY AND THE QUALIT…
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CRUMBLING ENGINE WIRING HARNESS IN MY CAR. I'VE COLLECTED AND RESTORED CARS FOR MANY YEARS, AND FIND THIS MANUFACTURING DEFECT TO BE UNBELIEVABLE - ESPECIALLY FROM MERCEDES BENZ. FURTHERMORE THE LACK OF RESPONSE OR RECALL IS FURTHER EVIDENCE THAT MB IS INDIFFERENT ABOUT EXISTING OWNER SATISFACTION, CUSTOMER SAFETY AND THE QUALITY OF THE BRAND THEY SO PROUDLY PRODUCE. THE REPAIR IS A $900+ EXPENSE TO ME, AND THERE'S NO ASSISTANCE FROM MB. *TR
NHTSA ODI #10241399
155,000 miles · Jul 25, 2008
Electrical SystemFuel System, Other
I OWN A 1994 MB E320,MY ASR LIGHT CAME ON AND STAYED ON FOR ABOUT 4 DAYS,TO SOLVE THIS PROBLEM I ADDED A FUEL ADDITIVE INTO TANK BECAUSE IT ACTUALLY SEEMED LIKE A FUEL PROBLEM. THE CAR DID RUN OK .A COUPLE OF WEEKS WENT BY AND SEEMED FINE, BUT THE CAR SLOWLY STARTED TO ACT UP AGAIN AND CAUGHT US ALL BY SURPRISE WHEN THE ASR LIG…
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I OWN A 1994 MB E320,MY ASR LIGHT CAME ON AND STAYED ON FOR ABOUT 4 DAYS,TO SOLVE THIS PROBLEM I ADDED A FUEL ADDITIVE INTO TANK BECAUSE IT ACTUALLY SEEMED LIKE A FUEL PROBLEM. THE CAR DID RUN OK .A COUPLE OF WEEKS WENT BY AND SEEMED FINE, BUT THE CAR SLOWLY STARTED TO ACT UP AGAIN AND CAUGHT US ALL BY SURPRISE WHEN THE ASR LIGHT CAME ON AND SO DID LIMP HOME MODE, WE WERE ALMOST INVOLVED IN A CAR ACCIDENT TWICE AND NOW THE CAR SEEMS TO BE SHUTTING OFF MORE OFTEN THAN BEFORE, AND NOW THE ASR DOES NOT TURN OFF AND IS STILL IN LIMP MODE. I AM VERY AFRAID TO DRIVE MY CAR BUT I HAVE NO CHOICE. I'VE DONE SOME RESEARCH AND THIS PROBLEM SEEMS TO BE HAPPENING TO ALOT OF MERCEDES BENZ OWNER'S IN THIS CLASS. I TOOK MY CAR TO A CERTIFIED MB MECHANIC AND CALLED THE DEALERSHIP,THIS ALL WAS WORTHLESS AND A WAIST OF MONEY AS IT SEEMS NEITHER NEW WHAT WAS WRONG WITH MY CAR. THIS IS THE ONLY VEHICLE I HAVE, SO I HAVE TO DEPEND ON IT EVEN THOUGH ITS NOT RELIABLE ANY MORE. MY FAMILY MEANS THE WORLD TO ME BUT, WHAT DOES IT MEAN TO MERCEDES BENZ? I CANNOT AFFORD ANOTHER CAR JUST NOW OR TO BE TAKING IT BACK AND FORTH TO BE SERVICED AND BE ADDING NEW PARTS TO IT, BEING THERE IS REALLY NOTHING WRONG WITH THE ONES BEING REPLACED, THIS IS A MANUFACTURER DEFECT,AND THEY NEED TO OWN UP TO IT. THIS IS NOT A PROBLEM TO IGNORE OR SWEEP UNDER THE RUG. MY CAR IS THE WAY IT IS BECAUSE OF THIS DEFECT AND SO ARE SOME OF MY PROBLEMS, BECAUSE LIKE I SAID BEFORE THIS VEHICLE IS THE SOURCE OF INCOME AS IT IS THE TRANSPORTATION OF 3CHILDREN ATTENDING SCHOOL AND MY NEWBORN BABY TO DR.VISITS. MERCEDES BENZ IF YOU READ THIS COMPLAINT AND I KNOW YOU WILL, PRAY NOTHING HAPPENS TO ME OR MY FAMILY BECAUSE YOU WILL BE HELD RESPONSIBLE FOR THIS,IF YOU WISH NOT TO BE, COME PICK UP YOUR CAR AND PAY BACK WHAT I PAID FOR IT SO I CAN BUY ME A RELIABLE CAR OR JUST MAKE IT RIGHT !! *TR
NHTSA ODI #10235778
75,000 miles · Jul 23, 2008
Electrical System
I HAVE A 1994 MERCEDES BENZ E320 WAGON AND THE ENGINE WIRING HARNESS INSULATION IS COMPLETELY FAILING. THIS RESULTED IN ME HAVING TO REPLACE IT FOR $1100. *TR
NHTSA ODI #10235431
122,565 miles · Mar 27, 2008
Electrical System
1994 MERCEDES-BENZ E500 ENGINE WIRE HARNESS FAILURE. WIRES HAVE DISINTEGRATED IN THE MAIN HARNESS RUN FOR THE ENGINE. SAME IS TRUE WITH WIRE HARNESS THAT RUNS DIRECT TO THE M/16 THROTTLE ACTUATOR. THROWING CODES AND ENGINE SURGES AND WILL CUT OUT. TOOK CAR TO THE DEALER TO DIAGNOSE AND THEY VERIFIED WHAT WAS A KNOWN FACT. THE WI…
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1994 MERCEDES-BENZ E500 ENGINE WIRE HARNESS FAILURE. WIRES HAVE DISINTEGRATED IN THE MAIN HARNESS RUN FOR THE ENGINE. SAME IS TRUE WITH WIRE HARNESS THAT RUNS DIRECT TO THE M/16 THROTTLE ACTUATOR. THROWING CODES AND ENGINE SURGES AND WILL CUT OUT. TOOK CAR TO THE DEALER TO DIAGNOSE AND THEY VERIFIED WHAT WAS A KNOWN FACT. THE WIRE SHEATHING HAS COMPLETELY CRACKED AND HAD EXPOSED WIRES IN CONTACT WITH ONE ANOTHER. *TR
NHTSA ODI #10222457
110,000 miles · Mar 23, 2008
Electrical System
1994 MERCEDES E320 WAS INVOLVED IN THE ELECTRICAL WIRING HARNESS FAILURE - INSULATION WAS CRACKING AND PEELING OFF AND SHORTED OUT - THIS CAUSED THE THROTTLE BODY AND TRACTION CONTROL TO SHORT OUT THE MAIN COMPUTER OF THE CAR. I HAVE READ OTHER COMPLAINTS FROM OTHER MERCEDES OWNERS TELLING ME THAT MERCEDES DOES NOT HAVE A RECAL…
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1994 MERCEDES E320 WAS INVOLVED IN THE ELECTRICAL WIRING HARNESS FAILURE - INSULATION WAS CRACKING AND PEELING OFF AND SHORTED OUT - THIS CAUSED THE THROTTLE BODY AND TRACTION CONTROL TO SHORT OUT THE MAIN COMPUTER OF THE CAR. I HAVE READ OTHER COMPLAINTS FROM OTHER MERCEDES OWNERS TELLING ME THAT MERCEDES DOES NOT HAVE A RECALL. THIS COST ME OVER $3,000 DOLLARS IN REPAIRS AND USAGE LOSS. NOW, I AM STILL CHASING MORE ELECTRICAL PROBLEMS FROM THE WIRING HARNESS DEFECTS. *TR
NHTSA ODI #10222079
Mileage unknown · Mar 2, 2008
Electrical SystemFire
MERCEDES BENZ E320 YEAR 1994. MECHANIC SAYS I HAVE A DEFECTIVE ENGINE HARNESS. CAR SPARKS AND CAUGHT FIRE ONCE WHEN STARTED. THIS IS BECOMING A VERY COMMON PROBLEMS IN MERCEDES SOLD AROUND THE YEAR 1994. A SAFETY RECALL IS REQUIRED ASAP TO AVOID INJURY AND CONSUMER ROBBERY. *TR
NHTSA ODI #10219827
50,000 miles · Jan 5, 2008
Electrical System
THE WIRING HARNESS IS DETERIORATING , THE INSULATION IS COMING OFF , PEELING ,AND I GUESS THIS IS DUE TO A KNOWN DEFECTIVE MANUFACTURING PROBLEM. THE CAR HAS BROKE DOWN ON THE ROAD THREE TIMES AND HAD TO BE TOWED IN TO BE FIXED , BUT THE WHOLE PROBLEM IS NOT SOLVED UNTIL THE WIRING HARNESS IS REPL…
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THE WIRING HARNESS IS DETERIORATING , THE INSULATION IS COMING OFF , PEELING ,AND I GUESS THIS IS DUE TO A KNOWN DEFECTIVE MANUFACTURING PROBLEM. THE CAR HAS BROKE DOWN ON THE ROAD THREE TIMES AND HAD TO BE TOWED IN TO BE FIXED , BUT THE WHOLE PROBLEM IS NOT SOLVED UNTIL THE WIRING HARNESS IS REPLACED I HAVE HEARD THAT THE COMPANT HAS IN THE PAST REPLACED SOME OF THE HARNESSES BUT I AM UNABE TO GET THE LOCAL DEALER TO RESPOND. *CN
NHTSA ODI #10213779