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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.

About this comparison →

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

What owners actually said

125 reports
Mileage unknown · Nov 21, 2006
Visibility

I OWN A 1999 MERCEDES BENZ ML320. I WAS IN DRIVING IN I-5 NORTH FROM LAKE OSWEGO TO PORTLAND, OREGON. WITH MY WIFE AND MY SISTER-IN-LAW AND HER DAUGHTER WITH A FRIEND, IT STARTED TO RAIN AND IT STARTED TO BECOME FOGGY. WHEN I TRIED TO TURN ON THE DEFROST, THE NOSE CAME ON BUT NO AIR CAME OUT. THIS MADE ME HAVE ZERO VISIBILITY AN…

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I OWN A 1999 MERCEDES BENZ ML320. I WAS IN DRIVING IN I-5 NORTH FROM LAKE OSWEGO TO PORTLAND, OREGON. WITH MY WIFE AND MY SISTER-IN-LAW AND HER DAUGHTER WITH A FRIEND, IT STARTED TO RAIN AND IT STARTED TO BECOME FOGGY. WHEN I TRIED TO TURN ON THE DEFROST, THE NOSE CAME ON BUT NO AIR CAME OUT. THIS MADE ME HAVE ZERO VISIBILITY AND IT PUT US IN GRAVE DANGER WHEN I HAD TO WIPE THE WHOLE WINDSHIELD WITH MY HANDS. THE NEXT DAY WE WENT TO MERCEDES BENZ DEALERSHIP AND GOT THE PROBLEM FIXED, BUT THERE MIGHT BE OTHERS WHO HAVE THIS PROBLEM AND THEY WON'T BE AS LUCKY AS WE WERE. THIS NEEDS TO BE A CASE THAT IS HANDLED AND IF YOU HELP OUR COMMUNITY OUT, YOU WILL BE THE PREVENTION OF A FUTURE HAZARD. *NM

NHTSA ODI #10174030

78,446 miles · Sep 7, 2006
Engine And Engine CoolingVehicle Speed ControlCrash

I AND MY 7 YEAR OLD DAUGHTER AND HER FRIEND WERE ENTERING MY DRIVEWAY ON AUG 14,2006, PAUSED TO OPEN MY GARAGE DOOR FROM THE CAR AND I WAS SLOWLY MOVING IN. ALL OF A SUDDEN CAR WENT OUT OF MY CONTROL IN A FLASH THAT I DID NOT EVEN HAVE TIME TO REACT. IT WENT AND HIT OUR OTHER PARKED CAR IN THE GARAGE WITH SUCH A HUGE FORCE THAT …

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I AND MY 7 YEAR OLD DAUGHTER AND HER FRIEND WERE ENTERING MY DRIVEWAY ON AUG 14,2006, PAUSED TO OPEN MY GARAGE DOOR FROM THE CAR AND I WAS SLOWLY MOVING IN. ALL OF A SUDDEN CAR WENT OUT OF MY CONTROL IN A FLASH THAT I DID NOT EVEN HAVE TIME TO REACT. IT WENT AND HIT OUR OTHER PARKED CAR IN THE GARAGE WITH SUCH A HUGE FORCE THAT THE SECOND CAR LITERALLY WENT AND TORE THE BEDROOM WALL. OUR SECOND CAR IS BADLY DAMAGED ON THE FRONT, BACK AND ONE SIDE (SCRAPING A POLE IN GARAGE) AND WALL NEEDS FIXING TOO. I TRULY SUSPECT THERE IS SOME MECHANICAL PROBLEM FOR THE SUDDEN/UNINTENDED ACCELERATION THAT LED TO THIS UNEXPECTED BEHAVIOR. SO FAR WE FOUND THE IGNITION GOT JAMMED (COULD NOT START AND HAD TO BE TOWED IN), OTHER THAN THE BUMPER/FRONT DAMAGES. CAR IS STILL IN THE BODY SHOP FOR REPAIRS, ONCE FINISHED IT WILL BE TAKEN TO THE DEALER FOR FURTHER ANALYSIS AND CHECK UP. *NM

NHTSA ODI #10167609

Mileage unknown · Jan 24, 2006
Service Brakes, HydraulicFire

FRONT BRAKES ON A 1999 MERCEDES BENZ ML 320 OVERHEATED, BRAKES WERE SMOKING . IT STARTED SEVERAL MONTHS AGO ON THE RIGHT FRONT, THEN TRANSFERRED TO THE LEFT SIDE THIS MONTH. * DEALERSHIP SERVICE MANAGER STATED THIS H HAPPENED BEFORE WITH A SIMILAR VEHICLE, WHERE FRONT BRAKES ACTUALLY CAUGHT ON FIRE. SERVICE MANAGER STATED TH…

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FRONT BRAKES ON A 1999 MERCEDES BENZ ML 320 OVERHEATED, BRAKES WERE SMOKING . IT STARTED SEVERAL MONTHS AGO ON THE RIGHT FRONT, THEN TRANSFERRED TO THE LEFT SIDE THIS MONTH. * DEALERSHIP SERVICE MANAGER STATED THIS H HAPPENED BEFORE WITH A SIMILAR VEHICLE, WHERE FRONT BRAKES ACTUALLY CAUGHT ON FIRE. SERVICE MANAGER STATED THAT THEY COULD NOT DETERMINE WHAT CAUSED THE OVERHEATING BRAKE PROBLEM , SO THEY REPLACED EVERYTHING ALL THE WAY UP TO THE BRAKE MASTER CYCLINDER. BRAKE FAILURE CAN LEAD TO AN ACCIDENT OR WDEATH IF NOT CORRECTED. *AK

NHTSA ODI #10148434

58,680 miles · Dec 10, 2005
Steering

MY PWR STEERING PRESSURE HOSE, FROM BOTTOM RADIATOR THRU PWR STEERING RACK ARE FOUR TIMES POP OUT AT HOSE CLAMP, EVERY WINTER PROBLEM! ( 2002 ) (2003) (2004) MERCEDES DEALER REPLACES A RECALL HOSE LAST WINTER & HOLD FOR A YEAR. (2005) AGAIN WINTER 2 DEC 05 THE SAME THING PROMBLEM (HOSE POP OUT AGAIN) I NEED HELP TO INVESTIGATE T…

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MY PWR STEERING PRESSURE HOSE, FROM BOTTOM RADIATOR THRU PWR STEERING RACK ARE FOUR TIMES POP OUT AT HOSE CLAMP, EVERY WINTER PROBLEM! ( 2002 ) (2003) (2004) MERCEDES DEALER REPLACES A RECALL HOSE LAST WINTER & HOLD FOR A YEAR. (2005) AGAIN WINTER 2 DEC 05 THE SAME THING PROMBLEM (HOSE POP OUT AGAIN) I NEED HELP TO INVESTIGATE THIS MATTER, PLS!!! TODAY, I WILL DROP OFF MY SUV 10 DEC 05 AT THE SAME DEALER. *NM

NHTSA ODI #10144881

58,700 miles · Dec 5, 2005
Steering

POWER STEERING HOSE. *JB

NHTSA ODI #10144526

72,000 miles · Nov 7, 2005
Engine And Engine Cooling

DT: THE CONTACT STATED THAT THE CATALYTIC CONVERTER CRACKED ALONG THE WELD THAT ATTACHES TO THE EXHAUST PIPE. THIS PROBLEM CAN NOT BE CORRECTED DUE TO A LACK OF PARTS. THERE WAS A TEMPORARY WELD PERFORMED, BUT IT HAS NOT CORRECTED THE PROBLEM. *AK

NHTSA ODI #10141959

72,000 miles · Aug 17, 2005
SteeringCrashInjury

MY WIFE DROVE FROM LAS VEGAS ON 15 FWY BACK HOME WHEN THE ENGINE LIGHT CAME ON. ABOUT 10 MINUTES LATER, THE VEHICLE PULLED TO THE LEFT SO SHE STEERED TO THE RIGHT BUT IT PULLED TO THE LEFT AGAIN. WHILE THE VEHICLE WAS PULLING, SHE APPLIED BRAKES TO SLOW IT DOWN BUT IT SEEM LIKE THE VEHICLE WENT FASTER AND FASTER. SHE HEARD A SOU…

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MY WIFE DROVE FROM LAS VEGAS ON 15 FWY BACK HOME WHEN THE ENGINE LIGHT CAME ON. ABOUT 10 MINUTES LATER, THE VEHICLE PULLED TO THE LEFT SO SHE STEERED TO THE RIGHT BUT IT PULLED TO THE LEFT AGAIN. WHILE THE VEHICLE WAS PULLING, SHE APPLIED BRAKES TO SLOW IT DOWN BUT IT SEEM LIKE THE VEHICLE WENT FASTER AND FASTER. SHE HEARD A SOUND "SHHH" SOUND LIKE A VACUUM LEAKS. THE STEERING WHEEL WAS PULLING TOO HARD TO THE LEFT SO SHE COULD NOT HOLD ON ANYMORE. THE CARE THEN WENT OFF ROAD AND ROLLED OVER, LANDING IN THE SECTION SEPARATING THE CARS GOING TO LAS VEGAS AND THE CARS GOING BACK. AFTER LANDING SHE SCREAMED HOW THE BABY, HOW THE BABY, HE WAS 14 MONTHS, HOW EVERY BODY--HER DAUGHTERS AND PARENTS...ALL 4 TIRES ARE SUV MICHELIN, JUST REPLACED ABOUT A MONTH. WE BELIEVE SOME THINGS WAS WRONG WITH THE VEHICLE.

NHTSA ODI #10133131

72,460 miles · Aug 3, 2005
Engine And Engine Cooling

DT: THE CONSUMER STATED THAT E OIL FILTER HOUSING FAILED. WHEN THE FILTER HOUSING FAILED THE OIL SPRAYED ALL OVER THE ENGINE AND THE MANIFOLD. THE OIL HAD BEEN CHANGED ON 7-30-2005. THE OIL FILTER ON FAILED ON AUGUST 1, 2005. THE OIL FILTER HAD BEEN TIGHTENED AND CHECKED. THE VEHICLE RAN NORMALLY AFTER THE OIL WAS CHANGED AND …

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DT: THE CONSUMER STATED THAT E OIL FILTER HOUSING FAILED. WHEN THE FILTER HOUSING FAILED THE OIL SPRAYED ALL OVER THE ENGINE AND THE MANIFOLD. THE OIL HAD BEEN CHANGED ON 7-30-2005. THE OIL FILTER ON FAILED ON AUGUST 1, 2005. THE OIL FILTER HAD BEEN TIGHTENED AND CHECKED. THE VEHICLE RAN NORMALLY AFTER THE OIL WAS CHANGED AND THE VEHICLE WAS STARTED. THE OWNER CHANGED THE OIL HIMSELF. THE OIL FILTER TAKES 8 ' QUARTS OF OIL. CONSUMER HA NOT TAKEN THE VEHICLE TO THE DEALERSHIP. INSTEAD, HE PURCHASED AN OIL FILTER,A PLASTIC HOUSING THAT HOLDS THE FILTER) AND CORRECTED THE PROBLEM HIMSELF. CONSUMER TALKED TO THE DEALERSHIP, AND THEY SAID THAT THE PART WAS NOT COVERED BY THE WARRANTY. TCONSUMER HA NOT CONTACTED THE MANUFACTURER. CONSUMER SAID THAT THE OIL FILTER DESIGN CHANGED SINCE THE OIL WAS CHANGED LAST, AND THIS NEW DESIGN WAS SUPPOSE TO BE AN IMPROVEMENT.*AKI

NHTSA ODI #10131231

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

33,000 miles · Jan 27, 2005
Fuel System, Gasoline

THE COMPUTER LET THE CONSUMER KNOW THAT BRAKE PADS WERE DEFECTIVE, WHILE TAKING THE VEHICLE OUT ON A TEST DRIVE CALIPER LOCKED UP. PRIOR TO THIS HAPPENING VEHICLE WAS STARTING IN THIRD GEAR, INSTEAD OF FIRST GEAR. IT DIFFICULT TO MOVE OUT IN TRAFFIC. DEALER/MECHANIC EXPERIENCED THE SAME PROBLEM, AND REPLACED THE FUEL PUMP…

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THE COMPUTER LET THE CONSUMER KNOW THAT BRAKE PADS WERE DEFECTIVE, WHILE TAKING THE VEHICLE OUT ON A TEST DRIVE CALIPER LOCKED UP. PRIOR TO THIS HAPPENING VEHICLE WAS STARTING IN THIRD GEAR, INSTEAD OF FIRST GEAR. IT DIFFICULT TO MOVE OUT IN TRAFFIC. DEALER/MECHANIC EXPERIENCED THE SAME PROBLEM, AND REPLACED THE FUEL PUMP, AND FUEL LINE.*AK

NHTSA ODI #10109044

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.