2003 Mercedes Benz ML320 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
22 owner complaints analyzed
0 distinct recall campaigns
51,723 mi median reported failure mileage
Scope: 2003 model year. Data snapshot: . 15 complaints include usable failure mileage.
Most common problems
Seats:Front Assembly:Seat Heater/Cooler is the most frequently named component, appearing in 6 of 22 complaints (27.3%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Steering behavior | 5 | 22.7% |
| Braking behavior | 3 | 13.6% |
| Transmission and shifting | 1 | 4.5% |
| Engine operation | 1 | 4.5% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Seats:Front Assembly:Seat Heater/Cooler | 6 |
| Steering:Hydraulic Power Assist:Hose, Piping, And Connections | 3 |
| Vehicle Speed Control | 3 |
| Electrical System | 2 |
| Electronic Stability Control (Esc) | 2 |
| Service Brakes | 2 |
| Steering | 2 |
| Air Bags:Frontal:Sensor/Control Module | 1 |
Seats:Front Assembly:Seat Heater/Cooler: 6; Steering:Hydraulic Power Assist:Hose, Piping, And Connections: 3; Vehicle Speed Control: 3; Electrical System: 2; Electronic Stability Control (Esc): 2; Service Brakes: 2; Steering: 2; Air Bags:Frontal:Sensor/Control Module: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 5 |
| 25,000 to 49,999 | 2 |
| 50,000 to 74,999 | 2 |
| 75,000 to 99,999 | 2 |
| 100,000 to 149,999 | 2 |
| 150,000 and above | 2 |
Under 25,000: 5; 25,000 to 49,999: 2; 50,000 to 74,999: 2; 75,000 to 99,999: 2; 100,000 to 149,999: 2; 150,000 and above: 2
Under 25,000 miles has the most reports with usable mileage (5). 7 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2003 | 2 |
| 2004 | 6 |
| 2005 | 2 |
| 2007 | 2 |
| 2008 | 2 |
| 2009 | 1 |
| 2010 | 1 |
| 2012 | 1 |
| 2014 | 1 |
| 2016 | 3 |
| 2018 | 1 |
2003: 2; 2004: 6; 2005: 2; 2007: 2; 2008: 2; 2009: 1; 2010: 1; 2012: 1; 2014: 1; 2016: 3; 2018: 1
Pattern summary
Seats:Front Assembly:Seat Heater/Cooler leads the component reports. Steering behavior appears in 5 complaint narratives. Braking behavior appears in 3 complaint narratives. Transmission and shifting appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10211473 · 2007-12-11 (December 11, 2007)
TL*THE CONTACT OWNS A 2003 MERCEDES BENZ ML320. THE CONTACT EXITED AN OFFRAMP AT 10 MPH AND THE VEHICLE CAME TO A COMPLETE STOP. WHEN SHE ATTEMPTED TO ACCELERATE, SHE LOST ALL POWER STEERING ABILITY. SHE WAS ABLE TO DRIVE HOME AND LATER HAD THE VEHICLE TOWED TO THE DEALER. THE DEALER STATED THAT THERE WAS A LEAK IN THE POWER STEERING UNIT AND ONE OF THE O-RINGS NEEDED TO BE REPLACED. THE VEHICLE IS CURRENTLY AT THE DEALER, BUT THE CONTACT FEELS THAT IT IS A MANUFACTURER DEFECT. THE CURRENT AND FAILURE MILEAGES WERE 62,000.
Owner-reported narrative. 62,000 miles reported. Look up ODI 10211473 at NHTSA ↗
Owner report 10215656 · 2008-01-22 (January 22, 2008)
CAR MAKES A "WASHING MACHINE" TYPE NOSE WHEN THE STEERING WHEEL IS TURNED. MERCEDES DEALER EVALUATED AND FOUND THE STEERING GEAR BOX/RACK & PINION IS "WORN" AND SHOULD BE REPLACED. ALTHOUGH DEALER RECOMMENDED REPLACEMENT OF PART THEY DID ADD A LUBRICANT TO POWER STEERING FLUID TO "ELIMINATE" THE NOISE (WHICH IS STILL THERE PRESENTLY). WARRANTY COMPANY REFUSES TO REPLACE RACK & PINION BECAUSE THEY STATE PART IS STILL FUNCTIONING AS INTENDED. HOWEVER, IF PART COMPLETELY FAILS AND THE STEERING GOES OUT, I COULD BE INVOLVED IN AN ACCIDENT, POS…
Owner-reported narrative. 51,723 miles reported. Look up ODI 10215656 at NHTSA ↗
Owner report 10079386 · 2004-06-16 (June 16, 2004)
WHILE PARKING VEHICLE ACCELERATED. CONSUMER APPLIED THE BRAKE PEDAL BUT THE BRAKES FAILED. THIS CAUSED CONSUMER'S VEHICLE TO COLLIDE WITH THE VEHICLE IN FRONT. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. THE CAUSE HAD NOT BEEN DETERMINED. *AK
Owner-reported narrative. Look up ODI 10079386 at NHTSA ↗
Owner report 10450251 · 2012-03-05 (March 5, 2012)
TL* THE CONTACT OWNS A 2003 MERCEDES BENZ ML320. WHILE DRIVING APPROXIMATELY 40 MPH, THE BRAKES WERE ENGAGED NUMEROUS TIMES BEFORE THERE WAS A REDUCTION IN THE SPEED. THE CONTACT SMELLED AN UNUSUAL ODOR INSIDE OF THE VEHICLE. IN ADDITION, ON SEPARATE OCCASIONS A BURNING ODOR OF BRAKES EMITTED THROUGHOUT THE VEHICLE WHILE DRIVING. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHO WAS UNABLE TO DETECT A PROBLEM. THE MANUFACTURER WAS NOTIFIED OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 30,000.
Owner-reported narrative. 30,000 miles reported. Look up ODI 10450251 at NHTSA ↗
Owner report 10210503 · 2007-11-20 (November 20, 2007)
2003 MERCEDES BENZ ML320 DEFECTS WITH TRANSMISSION AND COMPUTER UNIT. CONSUMER STATES THAT THE VEHICLE HAS BROKEN DOWN TWICE BECAUSE OF THESE DEFECTS AND THINKS THIS VEHICLE SHOULD BE CONSIDERED A LEMON. *KB
Owner-reported narrative. Look up ODI 10210503 at NHTSA ↗
Owner report 11060855 · 2018-01-05 (January 5, 2018)
LOSS OF POWER STEERING FLUID, IT APPEARS TO BE FROM THE HOSE CONNECTION TO THE RADIATOR DURING DRIVING AND WHILE STATIONERY. THIS ISSUE WAS PREVIOUSLY RECALLED, I BELIEVE TWICE. DEALER REQUESTED $125 DIAGNOSTIC CHARGE. MB USA INFORMED IN A PHONE CONVERSATION, THAT THIS PROBLEM WAS ALREADY FIXED OCTOBER 2008 UNDER RECALL, AND THE WARRANTY EXPIRED AND I SHOULD FIX ON MY OWN COST.
Owner-reported narrative. 79,500 miles reported. Look up ODI 11060855 at NHTSA ↗