1999 Mercedes Benz 320: Reliability Data

Source: NHTSA — 45 complaints
45
Total Complaints
50,500mi
Median Mileage
ELECTRICAL SYSTEM:12V/24V/48V BATTERY
Top Issue
0
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

36,100 25th Percentile
50,500 Median Mileage
55,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM:12V/24V/48V BATTERY
3
VEHICLE SPEED CONTROL
2
ELECTRICAL SYSTEM:WIRING
2
SEAT BELTS:INTEGRATED CHILD SEAT
2
POWER TRAIN:AUTOMATIC TRANSMISSION
2
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
2
ENGINE AND ENGINE COOLING:ENGINE
2
STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS
2
AIR BAGS
2
SUSPENSION
2

Severity Assessment

0
Crashes
1
Fires
2
Injuries
0
Deaths

Sample Complaint Reports

"MODEL ML320 THE CRUISE CONTROL STALK ON THIS VEHICLE IS LOCATED DIRECTLY ABOVE THE TURN SIGNAL STALK. THE CRUISE CONTROL & TURN SIGNAL STALKS ARE OF EQUAL LENGTH. WHEN MAKING A RIGHT TURN, AND ENGAGING THE RIGHT TURN SIGNAL, IT IS LIKELY TO ALSO GRAZE THE CRUISE CONTROL STALK, WHICH ENGAGES THE CR..."
"REF: OWNERS MANUAL, TRAILER TOWING PGS 96-99. BENZ REFUSES TO HELP RESOLVE PROBLEM! FACTORY WIRING HAS PROVIDED +12V (HOT) TO THE BRAKE CONTROLLER WIRE WHEN EVER BRAKE PEDAL IS DEPRESSED (ORANGE BRAKE SIGNAL WIRE PG98). CONVENTIONAL (AFTER MARKET BRAKE CONTROLLERS WORK BY MODULATING THIS LINE VOLTAG..."
"VEHCLE RECEIVES 0 FUEL PRESSURE DUE TO A FAILED FUEL PUMP. ALSO, THE STARTER RELAY INTERMITTENTLY MISREADS THE KEY CODE. VEHICLE IS CURRENTLY AT THE DEALERSHIP. *AK"

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28