IllustrationAIR BAG LIGHT CAME ON INTERMITTENTLY. CONSUMER WAS INFORMED THAT WHEN THAT LIGHT WERE ON THE AIR BAG DID NOT WORK. THE SENSOR WASA REPLACED. HOWEVER, THE PROBLEM RECURRED.*AK
2003 Mercedes Benz ML320
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2003 Mercedes Benz ML320 do not stand out strongly from the model-year median of 28.
About this comparison →How this year compares
Owner complaints by model year
Compare all ML320 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 15 of 22 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Seats. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Steering. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Vehicle Speed Control. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports4 fire reports2 injury reports
Air Bags complaints
1 reportsOfficial recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1PE05005 · Electric Seat Warmer Overheats/burns
Opened Feb 2, 2005 · Closed Jun 29, 2005
Status: closed (inferred from source dates) · Seats:front Assembly:seat Heater/cooler
THIS INVESTIGATION WAS OPENED BASED ON THREE CONSUMER COMPLAINTS OF ELECTRIC SEAT WARMER OVERHEATING IN MY 2003 MERCEDES BENZ ML-320 VEHICLES.CONSUMERS ALLEGED THAT SUCH FAILURES MAY INFLICT BURN INJURIES TO SEAT OCCUPANTS.INVESTIGATION DISCLOSED THAT THE IDENTICAL SEAT WARMER DESIGN WAS INSTALLED IN 65.5 PERCENT OF ALL M-CLASS VEHICLES PRODUCED DURING MY 2000-2005.THE ALLEGED DEFECT RESULTED FROM BREAKAGE OF THE ELECTRICAL BUS WIRE OF THE HEATER GRID IN THE OUTBOARD SIDE OF THE SEAT BOLSTER.THE FAILURES WERE CAUSED BY REPEATED HIGH STRESS APPLIED DURING OCCUPANT INGRESS AND EGRESS.A SIMILAR FAILURE MODE HAD BEEN PREVIOUSLY IDENTIFIED IN INVESTIGATIONS OF THIS TYPE OF FAILURE IN OTHER VEHICLES.THE RATES OF COMPLAINTS AND WARRANTY CLAIMS FOR THE SUBJECT VEHICLES, AS WELL AS FOR OTHER M-CLASS VEHICLES WITH THE SAME SEAT WARMER DESIGN, WERE IN SOME CASES HIGHER, BUT ON THE SAME ORDER OF MAGNITUDE AS THE RATES SEEN IN OTHER VEHICLES INVESTIGATED.THE INFORMATION DISCLOSED THAT SEAT CUSHION DAMAGE WAS LIMITED TO SMALL, LOCALIZED AREAS AND THAT NO RISK OF FIRE EXISTED.THE INJURIES REPORTED WERE CONSISTENTLY VERY MINOR IN SEVERITY AND AT RATES COMPARABLE TO THOSE SEEN ON OTHER INVESTIGATIONS.ODI CONCLUDED THAT A SAFETY-RELATED DEFECT TREND WAS NOT IDENTIFIED IN THIS MATTER AT THIS TIME.ACCORDINGLY, THIS PE HAS BEEN CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.