IllustrationRIGHT REAR STRUT AND SPRING ON MY 1999 MERCEDES ML 320 IS BAD AND NEEDS REPLACED AFTER ONLY 53,000 MILES, NONE OF WHICH ARE"OFF-ROAD" MILES. THE DEALER HAS QUOTED ~$750 TO REPLACE JUST THE STRUT. *LA
1999 Mercedes Benz ML320
Owner reports · Recalls · Investigations
More warning signs than most ML320 years
Owner complaints for the 1999 Mercedes Benz ML320 are substantially higher than 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
50–25K
725–50K
2950–75K
1375–100K
12100–150K
6150K+
72 reports with mileage · 53 unknown
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.
- Engine And Engine Cooling. Review the 35 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Steering. Review the 29 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 19 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
14 crash reports2 fire reports6 injury reports
Suspension complaints
5 reportsCREAKING NOISE NOTED AT LEFT REAR OVER BUMPS. MBZ SAYS NO COVERAGE DUE TO MILEAGE.
CONSUMER HEARS A CLUNKING NOISE IN THE REAR SUSPENSION UPON RIGHT TURNS, DEALER HAS BEEN UNABLE TO FIND PROBLEM. NLM
NOISE COMES FROM REAR SUSPENSION WHILE MAKING SHARP RIGHT TURN. YH
VEHICLE HAS BEEN OUT OF ALIGNMENT/BALANCE SINCE PURCHASE. VEHICLE HAS BEEN IN REPAIR FOUR TIMES SINCE PURCHASE IN JANUARY 1999 FOR A TOTAL OUT-OF-SERVICE OF ABOUT A MONTH. VEHICLE HAS ALTERNATELY BEEN ALIGNED, TIRES BALANCE OR ROTATED TO CORRECT VIBRATION OF VEHICLE AT ALL SPEEDS. ORIGINAL GENERAL TIRES WERE EXCHANGED FOR A S…
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VEHICLE HAS BEEN OUT OF ALIGNMENT/BALANCE SINCE PURCHASE. VEHICLE HAS BEEN IN REPAIR FOUR TIMES SINCE PURCHASE IN JANUARY 1999 FOR A TOTAL OUT-OF-SERVICE OF ABOUT A MONTH. VEHICLE HAS ALTERNATELY BEEN ALIGNED, TIRES BALANCE OR ROTATED TO CORRECT VIBRATION OF VEHICLE AT ALL SPEEDS. ORIGINAL GENERAL TIRES WERE EXCHANGED FOR A SET OF DUNLOPS IN MAY OF 1999, DUE TO DEPRESSIONS/BULGES IN SIDEWALLS. VEHICLE WAS RETURNED TO REPAIR IN NOVEMBER 1999 FOR OUT OF BALANCE/ALIGNMENT CONDITION. REPAIR SHOP SAID VEHICLE WAS RE-BALANCED USING LOAD-BEARING TECHNIQUE. VEHICLE VIBRATES AT ALL SPEEDS NOW, BUT PARTICULARLY AND UNCONTROLLABLY AT SPEEDS OVER 40 MPH. SEVERITY OF VIBRATION IS SUCH THAT ONE CANNOT HOLD A NORMAL CONVERSATION IN THE VEHICLE. VIBRATION ADVERSLY AFFECTS SAFETY AND HANDLING OF THE VEHICLE. DEALER REPORTS VEHICLE BALANCED/ALIGNED TO MERCEDES-BENZ SPECS AND NOTHING FURTHER CAN BE DONE TO CORRECT IT, AND THAT THIS IS THE ONLY VEHICLE THEY HAVE ENCOUNTERED WITH THIS PROBLEM. AN ALTERNATE MERCEDES SERVICE DEPARTMENT REPORTS ENCOUNTERING SEVERAL PROBLEMS IN KEEPING ALIGNMENT/BALANCE CORRECT ON ML320S. UNTIL REMEDIED, VEHICLE IS UNSAFE TO OPERATE AT SPEEDS OVER 40 MPH.( DOT NUMBER: )
Official 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
2PE03058 · Engine Crankshaft Pulley Failure
Opened Dec 17, 2003 · Closed Apr 22, 2004
Status: closed (inferred from source dates) · Engine And Engine Cooling:engine:gasoline:belts And Associated Pulleys
THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED THIS PRELIMINARY EVALUATION TO INVESTIGATE ALLEGATIONS OF ENGINE CRANKSHAFT PULLEY HARMONIC BALANCER FAILURE THAT COULD RESULT IN LOSS OF POWER-STEERING ASSIST.ODI HAS RECEIVED A TOTAL OF 546 NON-DUPLICATIVE REPORTS THAT ALLEGE ENGINE CRANKSHAFT PULLEY HARMONIC BALANCER FAILURE ON ALL MERCEDES-BENZ VEHICLES USING THE SUBJECT COMPONENT.THE SUBJECT COMPONENT FAILURES ARE PROGRESSIVE IN NATURE AND ONLY A SMALL PERCENTAGE OF THE COMPLAINTS AND WARRANT CLAIMS INVOLVED A FAILURE THAT HAD PROGRESSED FAR ENOUGH TO EFFECT POWER STEERING PERFORMANCE (6 OF 55 ODI COMPLAINTS REFERENCE INCREASED STEERING EFFORT).THERE HAVE BEEN NO CRASHES OR INJURIES RELATED TO THE ALLEGED DEFECT.A SAFETY-RELATED DEFECT HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.SEE SUMMARY REPORT ATTACHED FOR FURTHER DETAIL.
PE03006 · Power Steering Hose Assembly Leakage
Opened Feb 13, 2003 · Closed Apr 4, 2003
Status: closed (inferred from source dates) · Steering:hydraulic Power Assist:hose, Piping, And Connections; Steering:hydraulic Power Assist:power Steering Fluid
THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THE CONNECTION.THE LOSS OF POWER STEERING FLUID MAY RESULT IN GRADUAL REDUCTION IN POWER STEERING ASSIST (I.E., INCREASED STEERING EFFORT) OVER TIME, WITH POTENTIAL DAMAGE TO THE POWER STEERING PUMP. THERE HAVE ALSO BEEN A FEW INCIDENTS OF HOSE SEPARATION FROM THE FITTING, THAT HAVE RESULTED IN MORE RAPID REDUCTIONS OF POWER STEERING.TESTING CONDUCTED BY MERCEDES-BENZ INDICATES THAT THE LEAKED FLUID IS NOT LIKELY TO BE EXPOSED TO HOT ENGINE COMPONENTS.THERE ARE NO KNOWN ALLEGATIONS THAT THE DEFECT CONDITION HAS CAUSED A VEHICLE FIRE. MERCEDES-BENZ WILL CONDUCT A VOLUNTARY RECALL CAMPAIGN FOR THE SUBJECT M-CLASS VEHICLES.MERCEDES-BENZ WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER OF THE SUBJECT VEHICLES.DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY.
Additional source detail variants (2)
Steering:hydraulic Power Assist:hose, Piping, And Connections
THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THE CONNECTION.THE LOSS OF POWER STEERING FLUID MAY RESULT IN GRADUAL REDUCTION IN POWER STEERING ASSIST (I.E., INCREASED STEERING EFFORT) OVER TIME, WITH POTENTIAL DAMAGE TO THE POWER STEERING PUMP. THERE HAVE ALSO BEEN A FEW INCIDENTS OF HOSE SEPARATION FROM THE FITTING, THAT HAVE RESULTED IN MORE RAPID REDUCTIONS OF POWER STEERING.TESTING CONDUCTED BY MERCEDES-BENZ INDICATES THAT THE LEAKED FLUID IS NOT LIKELY TO BE EXPOSED TO HOT ENGINE COMPONENTS.THERE ARE NO KNOWN ALLEGATIONS THAT THE DEFECT CONDITION HAS CAUSED A VEHICLE FIRE. MERCEDES-BENZ WILL CONDUCT A VOLUNTARY RECALL CAMPAIGN FOR THE SUBJECT M-CLASS VEHICLES.MERCEDES-BENZ WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER OF THE SUBJECT VEHICLES.DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY.
Steering:hydraulic Power Assist:power Steering Fluid
THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THE CONNECTION.THE LOSS OF POWER STEERING FLUID MAY RESULT IN GRADUAL REDUCTION IN POWER STEERING ASSIST (I.E., INCREASED STEERING EFFORT) OVER TIME, WITH POTENTIAL DAMAGE TO THE POWER STEERING PUMP. THERE HAVE ALSO BEEN A FEW INCIDENTS OF HOSE SEPARATION FROM THE FITTING, THAT HAVE RESULTED IN MORE RAPID REDUCTIONS OF POWER STEERING.TESTING CONDUCTED BY MERCEDES-BENZ INDICATES THAT THE LEAKED FLUID IS NOT LIKELY TO BE EXPOSED TO HOT ENGINE COMPONENTS.THERE ARE NO KNOWN ALLEGATIONS THAT THE DEFECT CONDITION HAS CAUSED A VEHICLE FIRE. MERCEDES-BENZ WILL CONDUCT A VOLUNTARY RECALL CAMPAIGN FOR THE SUBJECT M-CLASS VEHICLES.MERCEDES-BENZ WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER OF THE SUBJECT VEHICLES.DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY.