IllustrationENGINE STOP RUNNING WHILE DRIVING. CAR WAS TOWED TO MECHANIC WHO FOUND THAT ENGINE HARNESS WAS COMPLETELY DEGRADED AND WIRES WERE TOUCHING EACH OTHER THANK GOD IT DID NOT CATCH FIRE INSTEAD IT SHUT OFF. MY MECHANIC SAYS THAT HE SEES THIS ALOT AND THAT THIS SHOULD NOT HAPPEN TO A VEHICLE LIKE THIS. *JS
1994 Mercedes Benz 300
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all 300 years →Counts vary with age, sales and reporting. They are not failure rates.
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: 1 of 4 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.
- Engine And Engine Cooling. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Electrical System. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 1 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 reports0 fire reports0 injury reports
What owners actually said
4 reportsMY MECHANIC REPORTED THAT THE INSULATION IS CRACKING AND PEELING AT THE HARNESS, AND THAT IT IS DANGER OF CAUSING SERIOUS ELECTRICAL DAMAGE THROUGHOUT THE SYSTEM, ENTAILING MALFUNCTION OF COMPUTERS, CRUISE CONTROL, BRAKE AND OTHER SYSTEMS, AS WELL AS SEVERE ENGINE DAMAGE, INCLUDING ENDANGERING PASSENGERS IN THE EVENT FAILURE OCC…
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MY MECHANIC REPORTED THAT THE INSULATION IS CRACKING AND PEELING AT THE HARNESS, AND THAT IT IS DANGER OF CAUSING SERIOUS ELECTRICAL DAMAGE THROUGHOUT THE SYSTEM, ENTAILING MALFUNCTION OF COMPUTERS, CRUISE CONTROL, BRAKE AND OTHER SYSTEMS, AS WELL AS SEVERE ENGINE DAMAGE, INCLUDING ENDANGERING PASSENGERS IN THE EVENT FAILURE OCCURS WHILE DRIVING. I HAVE BEEN ADVISED THAT THE PROBLEM IS OF POOR QUALITY INSULATION IS ENDEMIC AMONG 1993-96 MBZ MODELS. I OBSERVED THE HARNESS MYSELF, AND THE INSULATION ON ALL WIRES ENTERING THE HARNESS IS CRACKED AND WIRES ARE EITHER ACTUALLY EXPOSED OR ON THE VERGE OF EXPOSURE. THE CONDITION IS DANGEROUS, AND I AM ADVISED THAT THE LOCAL MBZ DEALER(RAB) DID OBTAIN AUTHORIZATION FROM MBZ IN ONE CASE TO REPLACE A SIMILARLY AFFECTED HARNESS WITH MBZ PROVIDING THE PARTS,BUT NOT THE LABOR. IT IS APPEARS THAT THE DEFECT IS DANGEROUS AND WIDESPREAD, AND PERHAPS IS SYMPTOMATIC, AS I NOTE THAT THERE IS ANOTHER COMPLAINT IN YOUR RECORDS ABOUT THE ELECTRICAL SYSTEM IN SAME YEARS MODEL. *TS *JB ***DIMSII IVOQ ENTRY POSTED AFTER 12-12-02 CUT OVER TO ARTEMIS***762213
WIRING-HARNESS FAILURE CREATED EXTREEM SAFETY CONCERN. GASOLINE FLOWED OPEN INTO CYLINDER #1 UNBURNED THRU TAILPIPE & C. CONVERTER(USED 10 GAL GAS IN 50 MILES). SHORT IN HARNESS ALSO SHORTED OUT HFM CONTROL. GAS LADEN OIL FILLED THE CRANKCASE
REAR AXLE FAILURE.
Official recalls
0No recalls in this snapshot.
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
0No exact-year investigations in this snapshot.