MERCEDES-BENZ 420 · model year

1995 MERCEDES-BENZ 420

16 NHTSA complaints, 1 crash report for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 1995MERCEDES-BENZ420 carries 16 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 1 crash, 2 fires, 1 injury, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.

Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1995 420 is electrical system:wiring:front underhood with 3 filings, followed by electrical system (3) and power train:automatic transmission (2). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.

NHTSA currently has 15 investigation files overlapping the 1995 420. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.

16
Complaints
1
Crashes
2
Fires
1
Injuries
0
Deaths

Total Complaints

16 filings

Crashes Reported

1 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD3
ELECTRICAL SYSTEM3
POWER TRAIN:AUTOMATIC TRANSMISSION2
VISIBILITY:SUN/MOON ROOF ASSEMBLY1
AIR BAGS:FRONTAL1
STEERING: STEERING WHEEL/HANDLE BAR1
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS1
SEAT BELTS:FRONT:ANCHORAGE1
ELECTRICAL SYSTEM:WIRING1
ENGINE AND ENGINE COOLING1
ENGINE1

Recent Complaints

20120529ENGINE

THERE SEEMS TO BE A PROBLEM THAT MERCEDES IS WELL AWARE OF WITH THE ENGINE WIRING HARNESS. THE INSULATION WAS POORLY DONE, WHICH CAUSES THE WIRING TO BREAKDOWN. THIS IS A VERY EXPENSIVE FIX FOR THE CONSUMER. SAFETY IS THE ISSUE HERE WHEN THIS CAUSES THE CAR TO FAIL TO ACCELERATE. *TR

Mileage: 82,000

20120403ELECTRICAL SYSTEM

THE ENGINE WIRING HARNESS ON MY 1995 MERCEDES BENZ S420 HAS DISINTEGRATED. THE WIRING INSULATION IS CRACKED AND BROKEN IN MANY PLACES, WHICH HAS RESULTED IN A NON-OPERATING CONDITION. THE CAR HAS STALLED 3 TIMES SO FAR, IN TRAFFIC, AND WILL NOW NOT RUN AT ALL. APPARENTLY THE WIRES HAVE BROKEN DOWN DUE TO THE HEAT OF THE ENGINE COMPARTMENT. I BELIEVE THE WIRES WERE NOT SUITABLE FOR THE APPLICATION THEY WERE USED FOR. *TR

Mileage: 91,567

20120403ENGINE AND ENGINE COOLING

THE ENGINE WIRING HARNESS ON MY 1995 MERCEDES BENZ S420 HAS DISINTEGRATED. THE WIRING INSULATION IS CRACKED AND BROKEN IN MANY PLACES, WHICH HAS RESULTED IN A NON-OPERATING CONDITION. THE CAR HAS STALLED 3 TIMES SO FAR, IN TRAFFIC, AND WILL NOW NOT RUN AT ALL. APPARENTLY THE WIRES HAVE BROKEN DOWN DUE TO THE HEAT OF THE ENGINE COMPARTMENT. I BELIEVE THE WIRES WERE NOT SUITABLE FOR THE APPLICATION THEY WERE USED FOR. *TR

Mileage: 91,567

20080819ELECTRICAL SYSTEM

THE ELECTRICAL WIRING SYSTEM PLASTIC COATING IS BREAKING DOWN AND THE BARE WIRES ARE SHORTING OUT MAKING THE CAR UNABLE TO USE. *TR

20080722ELECTRICAL SYSTEM

1995 420S MERCEDES IS HAVING PROBLEMS FIRING. CONCERNED ABOUT WIRING HARNESS. WAS CHECK AND MAY BE CAUSING THE PROBLEM. WHY IS THERE NOT A RECALL ON THIS IF SO MANY PEOPLE THAT OWN THESE VEHICLES ARE HAVING THE SAME PROBLEM? CAR IS HESITATING WHEN KEY IS TURNED TO RIGHT AND WILL NOT FIRE CORRECTLY. *TR

Mileage: 100,000

20070625ELECTRICAL SYSTEM:WIRING

1995 E420 MERCEDES BENZ: WIRE HARNESS HAS PREMATURELY DISINTEGRATED, CAUSING UNSAFE OPERATING CHARACTERISTICS TO APPEAR IN VEHICLE SUCH AS: SUDDEN LOSS OF POWER AND UNRESPONSIVENESS TO ACCELERATOR INPUT. *AK

Mileage: 108,750

20050913FireELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

TWO MAJOR FAILURES OF WIRING ON MY 1995 S420. (1) MAIN WIRING HARNESS SHORTED, BURNED INSULATION AND FAILURE TO OPERATE. DEALER CLAIMED NORMAL WITH A CAR THIS AGE. (2) THROTTLE ACTUATOR WIRING HARNESS SHORTED, AGAIN BURNED INSULATION AND OPERATE IN LIMPED MODE ONLY. CONTACTED REGIONAL MANAGER AND MB USA, RESULTING IN SENDING IN DAMAGED PART TO MB USA FOR ENGINEERING STUDY. ONE MONTH LATER I CONTACTED THE PRESIDENT OF MB USA. ONE WEEK LATER I WAS CONTACTED BY MB USA CUSTOMER SERVICE, WAS TOLD THEY (MB USA) KNEW NOTHING ABOUT THE ENGINEERING STUDY. I CONTACTED MY LOCAL DEALER,WHO CLAIMED THE FAULTY ACTUATOR WAS SHIPPED TO MB USA. THERE IS NOT ONLY A SERIOUS ENGINEERING PROBLEM WITH THESE WIRING HARNESSES BUT UNCONSCIONABLE THAT THEY CHOOSE TO IGNORE IT. FURTHER, I FOUND CUSTOMER SERVICE TO BE PRETTY MUCH NON EXISTENT, PARTICULARLY AT MB USA. *JB

Mileage: 58,000

20050715ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

SHORTLY AFTER PURCHASE OF A 1995 MERCEDEZ-BENZ E420, I WAS TOLD BY AN INDEPENDENT MECHANIC OF THE NEED TO REPLACE WIRING HARNESSES IN THE ENGINE COMPARTMENT BECAUSE THE WIRING INSULATION BECOMES BRITTLE, CRACKS, AND FALLS OFF. THIS WAS DEMONSTRATED TO BE THE CASE ON MY CAR, WITH THE MECHANIC SHOWING ME THE CONDITION OF THE WIRES IN THE ENGINE WIRING HARNESS. THIS REPAIR COST ME OVER $2000 - OF COURSE I HAVE RECEIPTS. I BELIEVE THIS TO BE A MANUFACTURING DEFECT - IT IS SO PREVALENT, I CAN FIND COUNTLESS MENTIONS OF IT IN MERCEDES DISCUSSION BOARDS ON THE INTERNET, WHOSE CONTRIBUTORS INCLUDE MERCEDES-TRAINED MECHANICS. MERCEDES SHOULD TREAT THIS AS A SAFETY-RELATED RECALL - DO YOU WANT YOUR ENGINE QUITTING ON THE FREEWAY? DO YOU WANT A FIRE IN YOUR ENGINE COMPARTMENT? MERCEDES SHOULD REFUND ME THE MONEY I SPENT RETURNING MY CAR TO A SAFE CONDITION.

Mileage: 110,000

20030813FireELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

AFTER PARKING THE VEHICLE, THE CONSUMER NOTICED SMOKE COMING FROM THE STEERING COLUMN. AS A RESULT OF THE FAILURE, FIRE CAME THROUGH THE FIREWALL. THE LOCAL FIRE DEPARTMENT ARRIVED TO EXTINGUISH THE FIRE. *AK THERE WERE NO PRIOR PROBLEMS. THE VEHICLE HAD FILLED WITH BLACK SMOKE WITH THE IGNITION OFF AND THE VEHICLE PARKED. THERE WAS NO WARNING. *SCC *JB

20020920SEAT BELTS:FRONT:ANCHORAGE

SEE INFORMATION RECORDED IN ATTACHED LETTER. COMPLAINT REGISTERED WITH CUSTOMER SERVICES CENTER, MERCEDES-BENZ, USA VIA TELEPHONE ON SEPTEMBER 13, AND 16, 2002, WITH NO RESULTS TAKEN TO RESOLVE FAULTY SEAT BELT. I NOTE THAT NHTSA BULLETIN NO.: SB049577, WAS ISSUED DURING THE MONTH OF SEPTEMBER 1996, THAT INDICATES THAT VEHICLES, MY MODEL YEAR WITHOUT SIDE AIR BAGS SRS SENSOR WAS UPDATED AND REPLACED BY PART #001 820 19 26. I FIND NO EVIDENCE BASED UPON A REVIEW OF THE VEHICLE MASTER INQUIRY (VMI) THAT SRS SENSOR WAS REPLACED. COPY OF LETTER OUTLINING MY CONCERNS RE: SAFETY ISSUE BEING MAILED THIS DATE.*AK

19980508POWER TRAIN:AUTOMATIC TRANSMISSION

ASR SYSTEM FAILURE, CAUSING VEHICLE TO GO INTO LIMP MODE.

19970122SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS

BRAKES VIBRATE, CAUSING ROARING SOUNDS WHEN APPLYING BRAKES FIRMLY AFTER DRIVING LONG DISTANCES.

19961029STEERING: STEERING WHEEL/HANDLE BAR

AFTER TURNING RIGHT, STEERING WHEEL RESISTS TURNING BACK TO LEFT POSITION.

19960404CrashAIR BAGS:FRONTAL

NO DEPLOYMENT OF DRIVER'S AIRBAG, CAUSING INJURY IN ACCIDENT. *SD

19960118VISIBILITY:SUN/MOON ROOF ASSEMBLY

SUN ROOF FAILED. *SKD

19951005POWER TRAIN:AUTOMATIC TRANSMISSION

VEHICLE CONTINUOUSLY VIBRATES WHEN IN ANY GEAR OTHER THAN NEUTRAL, DUE TO POSSIBLE DRIVE TRAIN COMPLICATIONS. *SKD

Compare 1995MERCEDES-BENZ420 to Similar Vehicles

NHTSA Investigations

View all investigations

Frequently Asked Questions

How many complaints does the 1995 MERCEDES-BENZ 420 have?
The 1995 MERCEDES-BENZ 420 has 16 NHTSA complaints, 1 crashes, 2 fires, 1 injuries, and 0 deaths reported.
What are the most common problems with the 1995 MERCEDES-BENZ 420?
The most-complained component for the 1995 MERCEDES-BENZ 420 is ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD with 3 complaints. Other frequently reported areas include ELECTRICAL SYSTEM and POWER TRAIN:AUTOMATIC TRANSMISSION.
Is the 1995 MERCEDES-BENZ 420 safe to buy?
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.

Vehicle Safety Guides

Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.