Verdict · NHTSA data
One of the years to avoid
With 64 complaints filed to NHTSA — about 1.6 times the median 320 year — the 1994 model ranks #1 of 9 320 years for complaint volume. It lands on the years-to-avoid list.
The trouble concentrates in one system: electrical system issues account for 75% of all reports (48 of 64), far ahead of engine at 5.
64
NHTSA complaints
1
Recalls
0
Investigations
2
Crash-involved
2
Fires reported
3
Injuries
0
Deaths
—
NCAP overall
| Component | Complaints | Share | vs prior year |
|---|---|---|---|
| Electrical System | 48 | 75% | new |
| Engine | 5 | 8% | new |
| Airbags | 4 | 6% | new |
| Climate Control (A/C & Heat) | 2 | 3% | new |
| Tires & Wheels | 1 | 2% | new |
| Transmission | 1 | 2% | new |
| Lighting | 1 | 2% | new |
| Seats | 1 | 2% | new |
| Suspension | 1 | 2% | new |
1 NHTSA recall campaign on file. Recall repairs are free at franchised dealers.
Defect
IF ONE OF THE HEADLAMP WIPER ARMS BECOMES MISALIGNED, THE WIPER BALDE CAN LODGE IN THE GROOVE UNDER THE HEADLAMP. IF THE WASHERS ARE ACTIVATED WITH THE WIPER BLADE IN THE MISALIGNED AND LODGED POSITION, THE WASHER PUMP WILL RUN CONTINUOUSLY EXPELLING ALL AVAILABLE FLUID.
Consequence
PUMP OPERATION IN THE ABSENCE OF FLUID CAN CAUSE THE PUMP TO OVERHEAT AND CAUSE A VEHICLE FIRE.
Remedy
DEALERS WILL REPLACE THE HEADLAMP WASHER PUMP ON THESE VEHICLES.
Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.
“MY 1994 MERCEDES-BENZ E320 CABRIOLET HAS A CHECK ENGINE LIGHT ON. AN INVESTIGATION LEADS TO DISINTEGRATED ENGINE WIRE HARNESS, THAT IS SHORTING. THE VEHICLE IS RUNNING ROUGH AND STALLING. THERE IS A POTENTIAL FOR A FIRE HAZARD. THE CAR STALLED ON HIGHWAY, CAUSING ME TO LOOSE CONTROL AND CRASH INTO…”
“I WAS CHANGING SPARK PLUGS AND SAW THE BAD WIRES IN THE HARNESS. I TAPED UP WHERE I COULD BUT WHEN I TOUCHED THE WIRE THE INSULATION JUST FELL OFF THE WIRES. I WAS ABLE TO GET CAR RUNNING FOR AWHILE BUT NOW IT RUNS BAD. I AM IN THE PROCESS OF TRYING TO REPLACE HARNESS AT THIS TIME. THIS IS CLEARLY…”
“WHILE VEHICLE WAS IN DEALERSHIP HAVING OTHER SERVICE PERFORMED, CONSUMER WAS ADVISED THAT THE AIR BAG RELAY MODULE ALSO NEEDED TO BE REPLACED, WHICH WAS NOT COVERED UNDER WARRANTY, CONSUMER STATES THE AIR BAG RELAY MODULE WAS NOT BROKEN BEFORE VEHICLE WAS TAKEN IN. *JB”
“TL* THE CONTACT OWNED A 1994 MERCEDES E-320. WHILE DRIVING APPROXIMATELY 65 MPH, THE CONTACT ENGAGED THE AIR CONDITIONER AND SMOKE BEGAN EMITTING FROM THE VENTS. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE CONTACT WAS TOLD THAT THE AIR CONDITIONING WIRES HAD MELTED. THE VEHICLE WAS…”
“I HAVE HAD NUMEROUS WEIRD DRIVETRAIN FAILURES WITH MY CAR... ONLY TO FIND OUT THAT THE ENGINE WIRING HARNESS HAS FAILED. UPON REPLACEMENT AND SUBSEQUENT INSPECTION, IT IS OBVIOUS THAT THERE IS AN INHERENT DEFECT WITH THIS HARNESS. ON A 12 YEAR OLD CAR, THE INSULATION ON THE ENGINE WIRING HARNESS IS…”
NHTSA data argues against it: 64 complaints put the 1994 model at #1 of 9 320 years. It is one of the 320 years to avoid.
According to NHTSA complaint data, the leading problem areas are electrical system (48 complaints), engine (5 complaints), airbags (4 complaints).
Yes — NHTSA lists 1 recall campaign affecting the 1994 Mercedes-Benz 320. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
Based on complaint rates and open investigations, the 320 years to avoid are 1994. The cleanest record among 320 years belongs to 1996.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.