1991 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 1991 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
- Engine416.7%
- Airbags416.7%
- Electrical312.5%
- Driver assistance28.3%
- Steering28.3%
- Brakes28.3%
- Tires & wheels14.2%
- Transmission14.2%
- Body & structure14.2%
- Fuel system14.2%
- Interior & seats14.2%
- Powertrain (other)14.2%
- Seat belts14.2%
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
REPLACED RIGHT TIE ROD ASSEMBLY. *CJ
ENGINE DIES WHILE DRIVING AFTER ABOUT THE FIRST 5 MINUTES WHEN THE ENGINE DIES IT CANNOT BE RESTARTED WITHOUT TURNING THE KEY OFF WHICH LOCKS THE STEERING WHILE YOUR STILL MOVING. THE CAR IS UNSAFE TO DRIVE BECAUSE YOU CAN BE HIT FROM BEHIND BY ANOTHER CAR. THE REPAIR SHOP HAS FOUND THE PROBLEM TO BE IN THE COMPUTER FOR THE FUEL INJECTION SYSTEM. *AK
Too few reports in this category for a page of its own — they appear in the full complaint list.
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
WHEN STARTING THE VEHICLE THE PASSENGER'S AIRBAG DEPLOYED UNEXPECTEDLY WITHOUT A FRONTAL IMPACT, CAUSING INJURIES TO THE OCCUPANT. NO PRIOR PROBLEMS WITH AIRBAGS. *AK
DURING A FRONTAL IMPACT ACCIDENT AT 35 MPH. THE DRIVER'S SIDE AIR BAG DID NOT DEPLOY. PASSENGER'S SIDE SHOULDER BELT DID NOT RETRACT, RESULTING IN AN INJURY. *AK
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
MY 1991 300SL BENZ HAS HAD TO HAVE THE ENGINE WIRING HARNESS REPLACED PER MB DEALER BECAUSE IT'S GOING BAD AND DECOMPOSING CAUSING A POTENTIAL FIRE PROBLEM. THIS AFTER A NO START PROBLEM AND A MONTH IN THE SHOP. AND THEY NOT BEING ABLE TO FIND THE CAUSE. NOW , AFTER REPLACING THE HARNESS , THEY ARE STILL NOT ABLE TO FIND THE PROBLEM. I HAVE BEEN TOLD THAT THE HARNESS IS A "GREEN WIRING HARNESS" AS REQUIRED BE GERMANY TO ITS AUTO MAKERS IN 1991-1996. THE DECOMPOSING OF THE WIRING CAUSES A FIRE HAZARD AND SHOULD BE REPLACED UNDER WARRANTY. *TR
ELECTRICAL WIRING OVERHEATED, CAUSING FIRE.
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
WHILE DRIVING ABOUT 50 MPH ACCELERATOR GOT STUCK, CAUSING VEHICLE TO GO UP TO 80 TO 100 MPH. CONSUMER HAD TO PUT VEHICLE INTO ANOTHER GEAR TO GET VEHICLE TO STOP ALSO, BRAKE SYSTEM CAUGHT ON FIRE. *AK
THROTTLE SENSOR FAILED, CAUSING LOSS OF POWER.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
REPLACED RIGHT TIE ROD ASSEMBLY. *CJ
CLAMP HOLDING POWER STEERING HOSE TOO BIG TO HOLD HOSE IN PLACE WHEN TIGHTENED ALL THE WAY, CAUSING FLUID TO LEAK OUT OF SYSTEM. *DSH
Too few reports in this category for a page of its own — they appear in the full complaint list.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
REPLACED RIGHT TIE ROD ASSEMBLY. *CJ
WHILE DRIVING ABOUT 50 MPH ACCELERATOR GOT STUCK, CAUSING VEHICLE TO GO UP TO 80 TO 100 MPH. CONSUMER HAD TO PUT VEHICLE INTO ANOTHER GEAR TO GET VEHICLE TO STOP ALSO, BRAKE SYSTEM CAUGHT ON FIRE. *AK
Too few reports in this category for a page of its own — they appear in the full complaint list.
Tires & wheels
Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.
From owner reports, verbatim
WHILE TRAVELING AT APPROXIMATELY 65 MPH IN 1991, MERCEDES BENZ, 300D 2.5 TURBO, RIGHT REAR GOODYEAR ROAD HANDLER VOYAGER LX TIRE SIZE P195/60R15, DOT PJUNYBLR319 EXPERIENCED A BLOWOUT IN SIDEWALL OF TIRE. THERE WAS APPROXIMATELY 10,000 MILES ON THE TIRES, AND THEY WERE NOT ORIGINAL EQUIPMENT ON VEHICLE. *AK *SLC
Too few reports in this category for a page of its own — they appear in the full complaint list.
Transmission
Reports naming the automatic or manual transmission, including shifting behaviour, shudder, slipping and transmission control modules.
From owner reports, verbatim
THE DRIVE TRAIN ON THE CONSUMERS 1991 MERCEDES BENZ 300 LOCKED UP. *JB THE PROBLEM HAD BEEN TOTALLY ISOLATED TO THE CONTROL UNIT. THE TOTAL LOCK UP OCCURRED INTERMITTENTLY OR THE PROBLEM MAY BE ELSEWHERE CAUSED BY A CERTAIN SET OF CONDITIONS. *SC
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
VEHICLE DESIGNED WITH MANY BLIND SPOTS.
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
DISTRIBUTOR ROTOR/BRACKET FAILED, CAUSING VEHICLE TO STALL. *DSH
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
FRONT DRIVER'S SIDE POWER SEATS ADJUSTS ITSELF WITHOUT OPERATOR INPUT OR CONTROL. REPLACED MICROPROCESSOR.
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
REPLACED RIGHT TIE ROD ASSEMBLY. *CJ
Too few reports in this category for a page of its own — they appear in the full complaint list.
Seat belts
Reports naming seat belts, buckles, retractors and pretensioners.
From owner reports, verbatim
DURING A FRONTAL IMPACT ACCIDENT AT 35 MPH. THE DRIVER'S SIDE AIR BAG DID NOT DEPLOY. PASSENGER'S SIDE SHOULDER BELT DID NOT RETRACT, RESULTING IN AN INJURY. *AK
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 .