Mercedes Benz 420 electrical problems
13 complaint narratives mention electrical terms.
Key facts
57 owner complaints analyzed
1 distinct recall campaigns
109,375 mi median reported failure mileage
Scope: 1986 to 1999 model years. Data snapshot: . 24 complaints include usable failure mileage.
Electrical and battery issues evidence
13 of 57 complaints match this topic (22.8%). The keyword filter can include complaints that mention a transmission without reporting its failure. View matching rules.
Owner report 10157901 · 2006-05-19 (May 19, 2006)
5/18/2006. CHECK ENGINE LIGHT APPEARED. TOOK VEHICLE TO MBZ REPAIR SHOP AND FOUND THE ENGINE WIRING HARNESS'S WIRE INSULATION BREAKING APART AND EXPOSING THE BARE WIRING. COST OF REPAIR +$900.00. *JB
Owner-reported narrative. Look up ODI 10157901 at NHTSA ↗
Owner report 10169170 · 2006-09-25 (September 25, 2006)
VEHICLE CHECKED AND FOUND THAT INSULATION ON ALL OF THE FUEL INJECTION WIRING, TEMPERATURE SENSOR AND FAN THERMAL SWITCH HARNESS DETERIORATED CAUSING WIRES TO RUB TOGETHER. CONSUMER DISCOVERED THAT HARNESS INSULATION IS MADE OF VERY POOR MATERIAL. THE INSULATION BREAKS VERY EASY AT THE TOUCH AND TURNS INTO DUST. THE WHOLE WIRE HARNESS IS IN THE SAME SITUATION THIS IS A MAJOR SAFETY ISSUE CAN STALL OR SHUT OFF WHILE DRIVING AT HIGH SPEED. REPLACE OF WIRE HARNESS AT A COST OF$1500 WAS NEEDED TO FIX. *JB
Owner-reported narrative. 117,000 miles reported. Look up ODI 10169170 at NHTSA ↗
Owner report 10189151 · 2007-04-28 (April 28, 2007)
I GOT 94 E420 BENZ WITH DEFECT ENGINE WIRING HARNESS. THEY ARE CRACKING. THE IDLE IS ROUGH AND I GOT ENGINE CODE ERRORS. ONE TIME THE ENGINE FAILED ON THE SURFACE STREET. IT WAS LUCKY THERE WAS NO CAR BEHIND ME AT THAT TIME. MY MECHANIC TOLD ME THAT ALL MERCEDES MODELS FROM 91-96 HAVE THIS PROBLEM. THAT WAS SO SAD THAT NO ONE HAS TAKEN ACTION AGAINST THE FACTORY. *TR
Owner-reported narrative. 65,000 miles reported. Look up ODI 10189151 at NHTSA ↗
Owner report 10220009 · 2008-03-04 (March 4, 2008)
VEHICLE IS RUNNING ERRATICALLY. UPON INVESTIGATION, I FOUND THAT THE ENGINE WIRING HARNESS IN MODEL YEARS INCLUDING MY 1994 MERCEDES BENZ E420 HAVE A CHRONIC PROBLEM WITH DETERIORATING INSULATION. AS SOME FIRES AND CRASHES HAVE BEEN REPORTED, I AM PAYING TO HAVE THIS PART REPLACED. *TR
Owner-reported narrative. 139,595 miles reported. Look up ODI 10220009 at NHTSA ↗
Owner report 10225890 · 2008-04-28 (April 28, 2008)
I OWN A 1994 S 420 MERCEDES-BENZ I AM VERY CONCERNED FOR MY CHILD'S SAFETY AND MY OWN SAFETY AS WELL. THE WIRING HARNESS IS SHORTING OUT EVERYWHERE... SHAME ON MERCEDES-BENZ OF AMERICA..THEY KNOW ABOUT THIS DANGER AND JUST IGNORE THE WHOLE THING.. I'VE RESEARCHED IT REALLY WELL AND THE SAME PROBLEM OCCURS OVER AND OVER WITH ALL CARS OF THIS VINTAGE..I WONDER HOW MANY PEOPLE WILL HAVE TO DIE BEFORE THEY RECALL ON THIS DANGEROUS SITUATION???THEY SHOULD STAND UP TO THE PLATE.. THE HARNESS IS 7-8 HUNDRED DOLLARS.. COME ON GUYS!!! HOW MUCH DO YO…
Owner-reported narrative. 90,000 miles reported. Look up ODI 10225890 at NHTSA ↗