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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.

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When problems were reported

Mileage at the reported incident

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

Electrical System complaints

3 reports
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71,000 miles · May 17, 2005
Electrical System

DT: INTERMITTENT DELAY OF 7 SECONDS WHEN GIVEN GAS. THE VEHICLE HAS BEEN IN THE DEALERSHIP 6 TIMES, AND THEY STILL HAVEN'T BEEN ABLE TO FIGURE THE PROBLEM OUT. THE CAR HAS HAD THIS PROBLEM FOR 2 YEARS. THE CAR IS WORSE WHEN IT'S HOT OUTSIDE AND WHEN THE CONSUMER IS PULLING OUT. THE CAR DOESN'T HAVE THE PROBLEM WHEN IT'S COOLER…

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DT: INTERMITTENT DELAY OF 7 SECONDS WHEN GIVEN GAS. THE VEHICLE HAS BEEN IN THE DEALERSHIP 6 TIMES, AND THEY STILL HAVEN'T BEEN ABLE TO FIGURE THE PROBLEM OUT. THE CAR HAS HAD THIS PROBLEM FOR 2 YEARS. THE CAR IS WORSE WHEN IT'S HOT OUTSIDE AND WHEN THE CONSUMER IS PULLING OUT. THE CAR DOESN'T HAVE THE PROBLEM WHEN IT'S COOLER OUTSIDE. THE DEALERSHIP HAS CHANGED OUT THE PEDAL VALUE SENSOR, A SLIDE MECHANISM FOR THE INTAKE MANIFOLD, A WIRING HARNESS AND FAN FOR THE ECM, THE FUEL PUMP AND FUEL FILTER WITH UPGRADES, THE ECM, AND NOW THE WIRING HARNESS HAS TO BE CHANGED SINCE IT WAS BUILT IN GERMANY.

NHTSA ODI #10121194

63,000 miles · Jun 24, 2003
Electrical SystemFire

WHILE DRIVING 25 MPH, ONE OF THE OCCUPANTS NOTICED SMOKE COMING FROM THE LEFT SIDE OF THE HOOD. EVERYONE IMMEDIATELY GOT OUT OF THE VEHICLE. THE FIRE DEPARTMENT WAS CONTACTED, CAME AND EXTINGUISHED THE FIRE UNDER THE HOOD. THE VEHICLE COULD NO LONGER BE DRIVEN. *AK

NHTSA ODI #10024838

Mileage unknown · Oct 9, 1999
Electrical SystemUnknown Or Other

TOTAL ELECTRICAL FAILURE AFTER STOPPING, TOWED TO DEALER IN VA. FOR REPAIR. LOCKS POPPING UP AND DOWN LIKE A MACHINE GUN, DEALER HAS "FIXED" 3 TIMES, CD PLAYER FAILURE AFTER A MONTH, DEALER REPLACED COMPLETE UNIT, DASH WARNING LIGHTS WERE EITHER OFF AT STARTING OR SOME ON OR ALL OFF, DEALER FOUND NO PROBLEM, SEEMS TO HAVE HEALED…

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TOTAL ELECTRICAL FAILURE AFTER STOPPING, TOWED TO DEALER IN VA. FOR REPAIR. LOCKS POPPING UP AND DOWN LIKE A MACHINE GUN, DEALER HAS "FIXED" 3 TIMES, CD PLAYER FAILURE AFTER A MONTH, DEALER REPLACED COMPLETE UNIT, DASH WARNING LIGHTS WERE EITHER OFF AT STARTING OR SOME ON OR ALL OFF, DEALER FOUND NO PROBLEM, SEEMS TO HAVE HEALED. WE DO NOT TRUST THE VEHICLE WHICH WE PURCHASED NEW ANYMORE. WE ARE CONSTANTLY AWAITING SOMETHING ELSE TO GO WRONG.

NHTSA ODI #713055

Official recalls

0

No 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

2

PE03058 · 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.