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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

Steering complaints

29 reports
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Mileage unknown · Jun 26, 2003
Steering

CONSUMER HAD POWER STEERING HOSE SERVICED BY DEALER IN 01/03. ON 06/12/03 EXPERIENCED POWER STEERING SYSTEM FAILURE. DEALER DIAGNOSED THAT THE STEERING PUMP AND RACK & PINION HAD FAILED. CONSUMER THEN HAD VEHICLE INSPECTED BY A REPUTABLE MECHANIC WHO ADVISED THAT THE POWER STEERING HOSE HAD BEEN PLACED TOO CLOSE TO THE GEAR W…

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CONSUMER HAD POWER STEERING HOSE SERVICED BY DEALER IN 01/03. ON 06/12/03 EXPERIENCED POWER STEERING SYSTEM FAILURE. DEALER DIAGNOSED THAT THE STEERING PUMP AND RACK & PINION HAD FAILED. CONSUMER THEN HAD VEHICLE INSPECTED BY A REPUTABLE MECHANIC WHO ADVISED THAT THE POWER STEERING HOSE HAD BEEN PLACED TOO CLOSE TO THE GEAR WHEN DEALER PREVIOUSLY SERVICED CAUSING THE CURRENT FAILURE.*AK

NHTSA ODI #10024977

75,000 miles · Jun 25, 2003
Steering

WHILE BACKING OUT OF THE DRIVEWAY STEERING FAILED. DEALER NOTIFIED. *AK

NHTSA ODI #10024914

Mileage unknown · Mar 10, 2003
Steering

THE POWER STEERING HOSE FAILED, WHICH CAUSED FLUID TO LEAK OUT.*JB

NHTSA ODI #10011176

32,974 miles · Mar 4, 2003
Steering

THE POWER STEERING FLUID LEAKED OUT OF THE VEHICLE. THE CONSUMER DISCOVERED THAT THERE AN INVESTIGATION GOING ON BUT NO RECALLS YET. *NLM THE POWER STEERING FLUID LEAKED OUT OF THE VEHICLE. THE CONSUMER DISCOVERED THAT THERE AN INVESTIGATION GOING ON BUT NO RECALLS YET. CAUSE: POWER STEERING HOSE CLAMP FELL OFF WHILE DRIVI…

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THE POWER STEERING FLUID LEAKED OUT OF THE VEHICLE. THE CONSUMER DISCOVERED THAT THERE AN INVESTIGATION GOING ON BUT NO RECALLS YET. *NLM THE POWER STEERING FLUID LEAKED OUT OF THE VEHICLE. THE CONSUMER DISCOVERED THAT THERE AN INVESTIGATION GOING ON BUT NO RECALLS YET. CAUSE: POWER STEERING HOSE CLAMP FELL OFF WHILE DRIVING. SOLUTION: NEW HOSE CLAMP INSTALLED AND SYSTEM HAD TO BE BLED AND FLUSHED. *MR

NHTSA ODI #10009827

64,225 miles · Mar 4, 2003
Fuel System, GasolineSteering

THE POWER STEERING FAILED UPON STARTING THE VEHICLE. FUEL LEAKED AND MADE IT DIFFICULT FOR THE DRIVER TO CONTROL THE VEHICLE. *NLM

NHTSA ODI #10009743

54,677 miles · Feb 27, 2003
Steering

STARTED TO DRIVE OUT OF PARKING LOT, POWER STEERING HOSE BLEW OFF, LOST ALL FLUID AND POWER STEERING ASSIST. HAVE TO TOW TO DEALER. REPAIR UNDER WARRANTY.*JB

NHTSA ODI #10008197

34,000 miles · Feb 1, 2003
Steering

THIS IS THE THIRD ATTEMPT TO MOVE FORWARD THROUGH THE SITE. IF THE OTHER MESSAGES DO NOT COME THROUGH, PLEASE CONTACT ME VIA EMAIL. TS

NHTSA ODI #10005086

Mileage unknown · Jan 8, 2003
SteeringCrash

WHEN MAKING A SLIGHT TURN OR JUST DRIVING STRAIGHT STEERING WHEEL STUCK UNEXPECTEDLY AND CONSUMER HAS HIT A WALL. DEALER HAS BEEN CONTACTED. PLEASE PROVIDE ANY FURTHER INFORMATION. TS.....*AK

NHTSA ODI #10002400

Mileage unknown · Oct 25, 2001
Steering

I HEARD A SNAP SOUND WHILE DRIVING AND A BURNING RUBBER SMELL AFTERWARDS. WE WERE GOING TO PULL INTO A PARKING LOT TO INVESTIGATE,BUT HALF WAY TO MAKING A LEFT TURN, WE LOST ALL STEERING CAPABILITIES AND COASTED TO THE SIDE OF A INTERSECTION. I NORMALLY DRIVE ON THE FREEWAY, AND IF THIS HAPPENED THEN, I AM SURE I WOULD HAVE HA…

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I HEARD A SNAP SOUND WHILE DRIVING AND A BURNING RUBBER SMELL AFTERWARDS. WE WERE GOING TO PULL INTO A PARKING LOT TO INVESTIGATE,BUT HALF WAY TO MAKING A LEFT TURN, WE LOST ALL STEERING CAPABILITIES AND COASTED TO THE SIDE OF A INTERSECTION. I NORMALLY DRIVE ON THE FREEWAY, AND IF THIS HAPPENED THEN, I AM SURE I WOULD HAVE HAD A MAJOR ACCIDENT.

NHTSA ODI #753652

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.