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1993 Mercedes Benz 300

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

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What owners reported most

All reported categories

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: 16 of 39 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 24 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Fuel System, Gasoline. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

2 crash reports2 fire reports3 injury reports

Electrical System complaints

24 reports
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80,000 miles · Mar 16, 2007
Electrical System

WIRING HARNESS DISINTERGRATED CAUSING WIRES EXPOSED AND TOUCHING OTHER WIRES. LITTLE OR NO INSULATION IS LEFT ON MOST WIRES. THE ENGINE SURGES/CHARGES WHILE COMPLETE IDLE AND BREAK FULLY ON HOLD.

NHTSA ODI #10185318

214,000 miles · Mar 12, 2007
Electrical System

DECAYED ENGINE WIRING HARNESS. MISCELLANEOUS ENGINE ERROR INDICATIONS, ASR LIGHT COMING ON (CAR IN "LIMP HOME" MODE). NOT TRACEABLE TO ANY COMPONENT FAILURE. INABILITY TO START THE CAR. REFUSAL OF INDEPENDENT MECHANIC TO WORK ON THE CAR UNTIL THE WIRING HARNESS HAS BEEN REPLACES. FAILURE OCCURS ON 65 MPH ROAD, INABILITY TO ATTAI…

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DECAYED ENGINE WIRING HARNESS. MISCELLANEOUS ENGINE ERROR INDICATIONS, ASR LIGHT COMING ON (CAR IN "LIMP HOME" MODE). NOT TRACEABLE TO ANY COMPONENT FAILURE. INABILITY TO START THE CAR. REFUSAL OF INDEPENDENT MECHANIC TO WORK ON THE CAR UNTIL THE WIRING HARNESS HAS BEEN REPLACES. FAILURE OCCURS ON 65 MPH ROAD, INABILITY TO ATTAIN HIGHWAY SPEEDS, REPEATED STALLING. CAR IS AT HOME IN GARAGE AND WILL NOT RUN FOR MORE THAN A FEW SECONDS. *JB

NHTSA ODI #10184878

90,000 miles · Apr 20, 2006
Electrical System

I OWN A 1993 MERCEDES BENZ 300E. I NOTICED A SECTION OF THE WIRING HARNESS UNDERNEATH MY HOOD BACK AGAINST THE FIREWALL HAS BEGUN TO DETERIORATE. THE PROTECTIVE PLASTIC ON THE WIRING HARNESS IS CRACKING, EXPOSING WIRE. LOOKS LIKE A FIRE HAZARD. MY CAR HAS STALLED SEVERAL TIMES FOR NO APPARENT REASON, POSSIBLY RELATED TO THE WIR…

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I OWN A 1993 MERCEDES BENZ 300E. I NOTICED A SECTION OF THE WIRING HARNESS UNDERNEATH MY HOOD BACK AGAINST THE FIREWALL HAS BEGUN TO DETERIORATE. THE PROTECTIVE PLASTIC ON THE WIRING HARNESS IS CRACKING, EXPOSING WIRE. LOOKS LIKE A FIRE HAZARD. MY CAR HAS STALLED SEVERAL TIMES FOR NO APPARENT REASON, POSSIBLY RELATED TO THE WIRE PROBLEM. *NM

NHTSA ODI #10155776

Mileage unknown · Mar 31, 2006
Electrical System

WHEN HAVING THE CAR SERVICED, THE REPAIR FACILITY IDENTIFIED MAJOR DETERIORATION OF THE ENGINE WIRING HARNESS. THEY INDICATED THAT THIS COULD BE A SAFETY HAZARD, POSSIBLY CAUSING A FIRE OR LOSING ALL POWER TO THE VEHICLE WHILE DRIVING, MAKING IT VERY DIFFICULT TO CONTROL THE VEHICLE. *NM

NHTSA ODI #10154300

98,000 miles · Mar 31, 2006
Electrical System

1993 MERCEDES BENZ 300E THE WIRING ON THE FUEL INJECTOR SYSTEM (AS WELL AS OTHER AREAS OF THE HARNESS) WAS REPLACED 5 YEARS AGO AS DEFECTIVE NOW IT IS DEFECTIVE AGAIN. MERCEDES BENZ REFUSES TO ACCEPT RESPONSIBILITY FOR THIS ISSUE. I HAVE BEEN TOLD THAT THE CAR IS A POTENTIAL SAFETY HAZARD AS THE RISK OF FIRE IS GOOD. MERCEDES…

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1993 MERCEDES BENZ 300E THE WIRING ON THE FUEL INJECTOR SYSTEM (AS WELL AS OTHER AREAS OF THE HARNESS) WAS REPLACED 5 YEARS AGO AS DEFECTIVE NOW IT IS DEFECTIVE AGAIN. MERCEDES BENZ REFUSES TO ACCEPT RESPONSIBILITY FOR THIS ISSUE. I HAVE BEEN TOLD THAT THE CAR IS A POTENTIAL SAFETY HAZARD AS THE RISK OF FIRE IS GOOD. MERCEDES APPEARS TO HAVE USED AN INSULATION THAT IS KNOWN FOR DEGRADATION AND REFUSES TO RECALL OR CARE FOR THE ISSUE. *JB

NHTSA ODI #10154262

158,000 miles · Mar 31, 2006
Electrical System

1993 MB 300E - WIRING HARNESS HAS BEGUN TO DETERIORATE CAUSING THE ENGINE TO STALL AND OR NOT START. STALLING CAN OCCUR WHILE DRIVING, THUS LOSING ALL POWER TO PROPERLY CONTROL THE VEHICLE. *JB

NHTSA ODI #10154252

Mileage unknown · Jan 12, 2004
Electrical System

DURING A RECENT SERVICE OF MY VEHICLE AT AN AUTHORIZED MERCEDES BENZ SERVICE CENTER, I WAS INFORMED THAT THE INSULATION COVERING MY WIRES WERE DECOMPOSING AND THE WIRES WERE EXPOSED TO THE ENGINE, HENCE CREATING A SAFETY HAZARD FOR MY FAMILY. DUE TO THE SEVERITY OF THIS PROBLEM, AND THE POSSIBLE CONSEQUENCES IF THE WIRES CAUG…

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DURING A RECENT SERVICE OF MY VEHICLE AT AN AUTHORIZED MERCEDES BENZ SERVICE CENTER, I WAS INFORMED THAT THE INSULATION COVERING MY WIRES WERE DECOMPOSING AND THE WIRES WERE EXPOSED TO THE ENGINE, HENCE CREATING A SAFETY HAZARD FOR MY FAMILY. DUE TO THE SEVERITY OF THIS PROBLEM, AND THE POSSIBLE CONSEQUENCES IF THE WIRES CAUGHT ON FIRE, I ATTEMPTED TO ASCERTAIN SOME CLARITY TO WHAT MAY HAVE CAUSED THIS PROBLEM. I THEN SPOKE TO THE MECHANIC, AT WHICH TIME HE ADVISED IT WAS A MATERIAL DEFECT. DURING THIS BRIEF DISCUSSION IT WAS ALSO REVEALED THAT THIS WAS NOT THE FIRST TIME HE HAD OBSERVED THIS PROBLEM WITH 1993 300E CLASS. SINCE, THIS APPEARED TO BE A HABITUAL DEFECT WITH THIS MAKE AND MODEL; I ASKED IF A RECALL HAD BEEN ISSUED TO REPLACE THIS DECOMPOSING WIRE HARNESS. AS A RESULT, HE REPLIED "NO." I THEN PAID TO REPLACE MY WIRE HARNESS BECAUSE OF THIS EXTREME HAZARDOUS CONDITION. *LA

NHTSA ODI #10052963

103,756 miles · Jan 27, 2003
Electrical System

MERCEDES 1993 300E WIRE HARNESS ENGINE WIRING HARNESS.(300E MERCEDES) CRACKED AND BRITTLE. MADE WITH VERY POOR MATERIALSMADE. THIS IS A KNOWN PROBLEM WITH THIS YEAR AND MAKE OF MERCEDES. IF YOU OWN ONE OF THESE CARS IT IS WELL KNOWN YOU WILL NEED TO REPLACE YOUR HARNESS. MERCEDES KNOWS OF THIS PROBLEM AND DOES NOTHING TO H…

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MERCEDES 1993 300E WIRE HARNESS ENGINE WIRING HARNESS.(300E MERCEDES) CRACKED AND BRITTLE. MADE WITH VERY POOR MATERIALSMADE. THIS IS A KNOWN PROBLEM WITH THIS YEAR AND MAKE OF MERCEDES. IF YOU OWN ONE OF THESE CARS IT IS WELL KNOWN YOU WILL NEED TO REPLACE YOUR HARNESS. MERCEDES KNOWS OF THIS PROBLEM AND DOES NOTHING TO HELP. I HAVE A PROBLEM WHEN MY CAR WILL NOT PASS SMOG UNTIL I REPLACE MINE. I THINK MERCEDES SHOULD A THE LEAST REPLACE THE PART AT NO CHARGE. THOUSANDS OF THESE CARS WERE MADE AND AT A COST OF OVER $500.00 PER HARNESS THIS IS A LOT OF MONEY FROM CONSUMERS. IF YOU CAN HELP GREAT. THANKS IN ADVANCE FOR YOUR HELP. DAVE MYERS

NHTSA ODI #10003491

103,756 miles · Jan 27, 2003
Electrical System

MERCEDES 1993 300E WIRE HARNESS ENGINE WIRING HARNESS.(300E MERCEDES) CRACKED AND BRITTLE. MADE WITH VERY POOR MATERIALSMADE. THIS IS A KNOWN PROBLEM WITH THIS YEAR AND MAKE OF MERCEDES. IF YOU OWN ONE OF THESE CARS IT IS WELL KNOWN YOU WILL NEED TO REPLACE YOUR HARNESS. MERCEDES KNOWS OF THIS PROBLEM AND DOES NOTHING TO H…

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MERCEDES 1993 300E WIRE HARNESS ENGINE WIRING HARNESS.(300E MERCEDES) CRACKED AND BRITTLE. MADE WITH VERY POOR MATERIALSMADE. THIS IS A KNOWN PROBLEM WITH THIS YEAR AND MAKE OF MERCEDES. IF YOU OWN ONE OF THESE CARS IT IS WELL KNOWN YOU WILL NEED TO REPLACE YOUR HARNESS. MERCEDES KNOWS OF THIS PROBLEM AND DOES NOTHING TO HELP. I HAVE A PROBLEM WHEN MY CAR WILL NOT PASS SMOG UNTIL I REPLACE MINE. I THINK MERCEDES SHOULD A THE LEAST REPLACE THE PART AT NO CHARGE. THOUSANDS OF THESE CARS WERE MADE AND AT A COST OF OVER $500.00 PER HARNESS THIS IS A LOT OF MONEY FROM CONSUMERS. IF YOU CAN HELP GREAT. THANKS IN ADVANCE FOR YOUR HELP. DAVE MYERS

NHTSA ODI #10003489

Mileage unknown · Sep 27, 2002
Electrical SystemFireInjury

I TALKED TO SEVERAL MACHANICS AND TO DEALER THEY TOLD ME THAT IT IS A COMMON PROBLEM IN THIS VEHICLE I AM VERY SUPRISED THAT IT HAS NEVER BEEN RECALLED. IT ALSO CAUSES THE CAR TO STALL DURING TAKE OFF AND ON THE ROAD WHILE DRIVING AT HIGHWAY SPEEDS IT WILL STALL.SOMETHING MUST BE DONE BEFORE PERSONS ARE KILLED OR INJURED. …

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I TALKED TO SEVERAL MACHANICS AND TO DEALER THEY TOLD ME THAT IT IS A COMMON PROBLEM IN THIS VEHICLE I AM VERY SUPRISED THAT IT HAS NEVER BEEN RECALLED. IT ALSO CAUSES THE CAR TO STALL DURING TAKE OFF AND ON THE ROAD WHILE DRIVING AT HIGHWAY SPEEDS IT WILL STALL.SOMETHING MUST BE DONE BEFORE PERSONS ARE KILLED OR INJURED. TS

NHTSA ODI #767819

Official recalls

1

96V175000 · Visibility

Sep 19, 1996

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.