1994 Mercedes-Benz 300 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 1994 Mercedes-Benz 300, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Engine228.6%
- Body & structure114.3%
- Driver assistance114.3%
- Electrical114.3%
- Fuel system114.3%
- Powertrain (other)114.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
ENGINE 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
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
Too few reports in this category for a page of its own — they appear in the full complaint list.
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
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
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
REAR AXLE FAILURE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
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
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
REAR AXLE FAILURE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
REAR AXLE FAILURE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .