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1998 Mercedes Benz ML320

Owner reports · Recalls · Investigations

More warning signs than most ML320 years

Owner complaints for the 1998 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

43 reports with mileage · 90 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 31 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 21 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Visibility. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

9 crash reports5 fire reports10 injury reports

What owners actually said

133 reports
139,000 miles · Feb 22, 2006
Steering

THE VEHICLE EXHIBITS A CLUNK IN THE FRONT SUSPENSION AND THE STEERING SEEMS TO BE LOOSE. I THINK IT IS DEFECTIVE STEERING GEAR. THE CAR WANDERS OVER THE ROAD AND SOMETIMES STARTS PULLING ITSELF INTO ONE LANE AND THEN TRIES TO GO TO THE OTHER LANE ALMOST CAUSING ME ON ONE OCCASION TO RUN OVER A KIA RIO. MERCEDES SHOULD HAVE TO…

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THE VEHICLE EXHIBITS A CLUNK IN THE FRONT SUSPENSION AND THE STEERING SEEMS TO BE LOOSE. I THINK IT IS DEFECTIVE STEERING GEAR. THE CAR WANDERS OVER THE ROAD AND SOMETIMES STARTS PULLING ITSELF INTO ONE LANE AND THEN TRIES TO GO TO THE OTHER LANE ALMOST CAUSING ME ON ONE OCCASION TO RUN OVER A KIA RIO. MERCEDES SHOULD HAVE TO REPAIR DEFECTIVE STEERING GEAR FOR FREE. *NM

NHTSA ODI #10150914

80,000 miles · Jan 6, 2006
Electrical System

CAR FAILED TO START AS KEY SECURITY CHIP NOT RECONIZED. NEEDS NEW KEY. TOWED TO DEALER WHO SAID 8 KEYS HAVE ALREADY BEEN ISSUED TO THIS CAR, MUST REPLACE ALL LOCKS, ENGINE MODULES, ETC COST $3600.00. CONSIDER THIS MAJOR DESIGN FLAW. *JB

NHTSA ODI #10147106

Mileage unknown · Dec 30, 2005
Engine And Engine Cooling

CATALYTIC CONVERTER NEEDS REPLACING. ENGINE IS SOUNDING VERY LOUD. THE CHECK ENGINE LIGHT IS ON. PART WAS ORDERED IN SEPTEMBER 2005. AS OF TODAY, 12/30/05, THE PART IS STILL NOT AVAILABLE. THE MERCEDES ACCOUNT MANAGER SAID OVER 1200 CATALYTIC CONVERTERS ARE ON BACK ORDER FOR THE US AND THERE ARE 2 PEOPLE WHO HAVE BEEN WAITING LO…

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CATALYTIC CONVERTER NEEDS REPLACING. ENGINE IS SOUNDING VERY LOUD. THE CHECK ENGINE LIGHT IS ON. PART WAS ORDERED IN SEPTEMBER 2005. AS OF TODAY, 12/30/05, THE PART IS STILL NOT AVAILABLE. THE MERCEDES ACCOUNT MANAGER SAID OVER 1200 CATALYTIC CONVERTERS ARE ON BACK ORDER FOR THE US AND THERE ARE 2 PEOPLE WHO HAVE BEEN WAITING LONGER THAN US IN AUSTIN FOR THE PART. HE SAID IT MAY BECOME A RECALL. WHY ARE SO MANY OF THESE PARTS ALL FAILING AT THE SAME TIME THAT SUPPLY CANNOT KEEP UP WITH DEMAND? I FEEL MY VEHICLE MAY BE UNSAFE TO DRIVE AND HAVE NO ACCESS TO A PART TO CORRECT THE DEFECT. *NM

NHTSA ODI #10146535

145,000 miles · Nov 2, 2005
Electrical SystemEngine And Engine Cooling

OUR 1998 MERCEDES M320 HAS BEEN SUBJECT TO UNEXPECTED STALLING FOR SOME TIME. MORE RECENTLY THIS HAS INCREASED IN FREQUENCY AND WE HAVE PERIODS OF LOSS (REDUCTION) OF POWER WHILE DRIVING. THE DEALER ADVISES THAT WE HAVE DETERIORATION OF THE CATALYTIC CONVERTERS AND THAT THERE HAS BEEN A RECALL FOR THIS PROBLEM ON NEWER MODELS OF…

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OUR 1998 MERCEDES M320 HAS BEEN SUBJECT TO UNEXPECTED STALLING FOR SOME TIME. MORE RECENTLY THIS HAS INCREASED IN FREQUENCY AND WE HAVE PERIODS OF LOSS (REDUCTION) OF POWER WHILE DRIVING. THE DEALER ADVISES THAT WE HAVE DETERIORATION OF THE CATALYTIC CONVERTERS AND THAT THERE HAS BEEN A RECALL FOR THIS PROBLEM ON NEWER MODELS OF THE M CLASS - BUT NOT OUR YEAR. WE HAVE THE CAR AT THE DEALER WAITING FOR REPLACEMENT PARTS. WE ARE TOLD IT WILL BE A NUMBER OF WEEKS SINCE THE PARTS ARE IN GREAT DEMAND. REPAIRS WILL COST OVER $2,000 - BUT THE CAR IS CLEARLY UNSAFE. MOST FREQUENT STALLS ARE STARTING AT A LIGHT OR STOP SIGN. ONE CONCERN IS KNOWING THIS PROBLEM WITH MODEL YEARS JUST NEWER THAN OURS ARE SUBJECT TO RECALL WHILE OUR YEAR ISN'T. THE OTHER ISSUE IS HOW DIFFICULT IT WAS FOR THE DEALER TO IDENTIFY THE PROBLEM UNTIL IT BECAME VERY SEVERE (OR THEY LEARNED OF THE SOLUTION DUE TO THE RECALL OF OTHER YEARS. *JB

NHTSA ODI #10141589

Mileage unknown · Sep 29, 2005
Engine And Engine Cooling

THE RIGHT SIDE CATALYTIC CONVERTER SPLIT AT THE NECK. WHILE THE LOCAL MERCEDES BENZ DEALER FREELY ADMITS THAT THIS IS A COMMON PROBLEM ON THIS CLASS OF CAR AND THAT THERE IS A RECALL ON THIS VERY PROBLEM, THEY TELL ME THAT MY VIN NUMBER IS NOT COVERED AND IF I WANT TO AVOID THE PROBLEMS ASSOCIATED WITH A LEAKING EXHAUST SYSTEM, …

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THE RIGHT SIDE CATALYTIC CONVERTER SPLIT AT THE NECK. WHILE THE LOCAL MERCEDES BENZ DEALER FREELY ADMITS THAT THIS IS A COMMON PROBLEM ON THIS CLASS OF CAR AND THAT THERE IS A RECALL ON THIS VERY PROBLEM, THEY TELL ME THAT MY VIN NUMBER IS NOT COVERED AND IF I WANT TO AVOID THE PROBLEMS ASSOCIATED WITH A LEAKING EXHAUST SYSTEM, I MUST REPLACE IT MYSELF. THIS IS OBVIOUSLY A MUCH WIDER PROBLEM THAN MERCEDES BENZ IS WILLING TO ADMIT TO. *JB

NHTSA ODI #10138149

85,000 miles · Aug 9, 2005
Engine And Engine Cooling

HARMONIC BALANCE PULLEY WAS FAILED AND WAS RECALLED 1998 MERCEDES ML320 -[XXX]. MERCEDES REFUSED TO PAY TOTAL LABOR FOR PROCESS. VEHICLE HAS NO EQUIPMENT OTHER THAN MERCEDES MADE AND INSTALLED EQUIPMENT. VEHICLE HAS MERCEDES FOG LIGHT BAR ON FRONT (STANDARD MERCEDES MADE AND INSTALLED ITEMS). IF THE PART HAD NOT BEEN DEFECTIV…

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HARMONIC BALANCE PULLEY WAS FAILED AND WAS RECALLED 1998 MERCEDES ML320 -[XXX]. MERCEDES REFUSED TO PAY TOTAL LABOR FOR PROCESS. VEHICLE HAS NO EQUIPMENT OTHER THAN MERCEDES MADE AND INSTALLED EQUIPMENT. VEHICLE HAS MERCEDES FOG LIGHT BAR ON FRONT (STANDARD MERCEDES MADE AND INSTALLED ITEMS). IF THE PART HAD NOT BEEN DEFECTIVE, THIS CHARGE WOULD NOT HAVE OCCURRED. REGARDLESS OF THE FACT THAT IS WAS INSTALLED BY MERCEDES BEFORE I GOT THE CAR--I DO NOT FEEL THAT I SHOULD BE BURGEONED WITH MERCEDES COSTS DUE TO POOR QUALITY OF DEFECTIVE PARTS. *NM UPDATED 07/19/2012 *JS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI #10132150

59,120 miles · Mar 29, 2005
Service Brakes, Hydraulic

WHILE APPLYING BRAKES AT 25 MPH THE BRAKE PEDAL WENT TO THE FLOOR AND THE VEHICLE CONTINUED ON THROUGH AN INTERSECTION CONTROLLED BY A STOP SIGN. CONSUMER WAS ABLE TO COAST THE VEHICLE THROUGH THE INTERSECTION WITHOUT AN ACCIDENT AND BRING THE VEHICLE TO A STOP. VEHICLE WAS TOWED TO A REPAIR SHOP AND TO A DEALER, WHO INFORMED CO…

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WHILE APPLYING BRAKES AT 25 MPH THE BRAKE PEDAL WENT TO THE FLOOR AND THE VEHICLE CONTINUED ON THROUGH AN INTERSECTION CONTROLLED BY A STOP SIGN. CONSUMER WAS ABLE TO COAST THE VEHICLE THROUGH THE INTERSECTION WITHOUT AN ACCIDENT AND BRING THE VEHICLE TO A STOP. VEHICLE WAS TOWED TO A REPAIR SHOP AND TO A DEALER, WHO INFORMED CONSUMER THAT THE BRAKE LINE LEADING TO THE REAR NEEDED TO BE REPLACED DUE TO CORROSION.*AK

NHTSA ODI #10117013

140,000 miles · Nov 18, 2004
Vehicle Speed Control

WHILE DRIVING AT HIGHWAY SPEED THROTTLE STICKS. AS A RESULT, CONSUMER HAD DIFFICULTY SLOWING DOWN. *AK

NHTSA ODI #10101300

Mileage unknown · Nov 15, 2004
Engine And Engine Cooling

VEHICLE STALLED WHENEVER IT WAS DRIVEN. THERE WERE NO CURRENT RECALLS FOR THIS VEHICLE.*AK

NHTSA ODI #10099959

Mileage unknown · Oct 28, 2004
Power Train

WHILE APPLYING THE ACCELERATOR PEDAL HEARD A LOUD POPPING NOISE COMING FROM THE FRONT. VEHICLE VIBRATED UNCONTROLLABLY. HOWEVER, CONSUMER WAS ABLE TO MAINTAIN CONTROL OF THE VEHICLE, AND DROVE IT TO THE DEALER FOR INSPECTION. MECHANIC DETERMINED THAT THE TRANSFER CASE NEEDED TO BE REPLACED. *AK

NHTSA ODI #10098986

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

1

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.