1986 Mercedes-Benz 420 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 1986 Mercedes-Benz 420, 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
- Driver assistance222.2%
- Brakes111.1%
- Electrical111.1%
- Fuel system111.1%
- Exterior lighting111.1%
- Suspension111.1%
- Body & structure111.1%
- Tires & wheels111.1%
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
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
GOT IN THE VEHICLE, STARTED THE IGNITION, AND VEHICLE ACCELERATED DURING 80 MPH ON WET PAVEMENT. VEHICLE KEPT SPINNING AROUND AND AROUND AND SLAMMED AGAINST THE CURB AND BOUNCED BACK AND FORTH AGAINST THE CURB. ALSO, WHEEL CAME OFF AND VEHICLE ENDED UP IN CONSUMER'S YARD BETWEEN AN OAK TREE AND A TELEPHONE POLE. *AK
THE CAR ACCELERATED WHEN TRYING TO STOP AT A LIGHT. PLEASE DESCRIBE. TT
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
THE CONSUMER STATE'S WHEN DRIVING THEIR IS A GASOLINE SMELL WITHIN THE VEHICLE, THE ANTENNA IS BROKEN, BRAKE LIGHTAND THE TAIL LIGHT FAILED AND THEIR IS A HOLE WITHIN THE GAS TANK. MJS
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
THE CONSUMER STATE'S WHEN DRIVING THEIR IS A GASOLINE SMELL WITHIN THE VEHICLE, THE ANTENNA IS BROKEN, BRAKE LIGHTAND THE TAIL LIGHT FAILED AND THEIR IS A HOLE WITHIN THE GAS TANK. MJS
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
THE CONSUMER STATE'S WHEN DRIVING THEIR IS A GASOLINE SMELL WITHIN THE VEHICLE, THE ANTENNA IS BROKEN, BRAKE LIGHTAND THE TAIL LIGHT FAILED AND THEIR IS A HOLE WITHIN THE GAS TANK. MJS
Too few reports in this category for a page of its own — they appear in the full complaint list.
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
THE CONSUMER STATE'S WHEN DRIVING THEIR IS A GASOLINE SMELL WITHIN THE VEHICLE, THE ANTENNA IS BROKEN, BRAKE LIGHTAND THE TAIL LIGHT FAILED AND THEIR IS A HOLE WITHIN THE GAS TANK. MJS
Too few reports in this category for a page of its own — they appear in the full complaint list.
Suspension
Reports naming suspension components — springs, struts, shocks, control arms and related hardware.
From owner reports, verbatim
RIGHT REAR LOWER CONTROL ARM RUSTED THROUGH. NO OTHER SUBFRAME CORROSION VISIBLE.
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
MECHANIC WAS GOING TO SERVICE ENGINE WHEN HE PUSHED HOOD OFF. HOOD FLEW OFF AND BROKE WINDSHIELD, AND CHIPPED THE PAINT. HINGE SPRING WAS DETACHED FROM RIGHT SIDE OF HOOD. DEALERSHIP WAS AWARE OF PROBLEM.*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
BRIDGESTONE TIRES (P205 65 R15) EXPERIENCED TREAD SEPARATION, CONSUMER IS REQUESTING REIMBURSEMENT FOR THE REPLACEMENT OF THE FAULTY TIRES. *SLC
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 .