VehicleVerdict

2003 Mercedes-Benz M-Class problems

Verdict · NHTSA data

Limited data — recalls on file

NHTSA has just 12 complaints on file for the 2003 Mercedes-Benz M-Class — too few to judge reliability from owner reports alone — but 3 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.

12

NHTSA complaints

3

Recalls

1

Investigations

1

Crash-involved

2

Fires reported

6

Injuries

0

Deaths

—

NCAP overall

How does 2003 compare to other M-Class years?

M-Class NHTSA complaints by model year, 2003 highlighted32 complaints1998: 6 complaints1999: 28 complaints2000: 32 complaints2001: 9 complaints2002: 5 complaints2003: 12 complaints2004: 0 complaints2006: 18 complaints2007: 3 complaints2008: 1 complaints2009: 1 complaints
M-Class NHTSA complaints by model year, 2003 highlighted. Red bars are years to avoid.

See all M-Class years to avoid →

What are the most common 2003 Mercedes-Benz M-Class problems?

ComponentComplaintsShare
Electrical System433%
Seats217%
Engine217%
Transmission18%
Lighting18%
Fuel System18%
Steering18%

Does the 2003 Mercedes-Benz M-Class have recalls?

3 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.

11V208000Speed ControlMarch 31, 2011 · 136,751 units

Defect

MERCEDES-BENZ IS RECALLING CERTAIN MODEL YEAR 1999-2002 M-CLASS AND MODEL YEAR 2000-2003 M-CLASS AMG VEHICLES. THE CRUISE CONTROL SYSTEM IN THE AFFECTED VEHICLES ALLOWS THE DRIVER TO DISENGAGE THE SYSTEM IN A NUMBER OF WAYS, INCLUDING TAPPING THE BRAKE PEDAL, USING THE CRUISE CONTROL STALK, OR BRAKING THE VEHICLE ENOUGH TO REACH A CERTAIN RATE OF DECELERATION. MERCEDES-BENZ HAS DETERMINED THAT UNDER CERTAIN CIRCUMSTANCES USE OF THE BRAKE PEDAL MAY NOT AUTOMATICALLY DISENGAGE CRUISE CONTROL AS EXPECTED BY THE DRIVER, ALTHOUGH THE OTHER MEANS OF DEACTIVATING CRUISE CONTROL REMAIN FULLY OPERATIVE. SPECIFICALLY, WHERE THE DRIVER PUMPS THE BRAKES RATHER THAN APPLYING CONSISTENT PEDAL FORCE, THE LEVEL OF FORCE REQUIRED MAY BE UNUSUALLY HIGH.

Consequence

DIFFICULTY OR DELAY IN DISENGAGING CRUISE CONTROL CAN INCREASE THE RISK OF A CRASH.

Remedy

DEALERS WILL REPAIR THE VEHICLES FREE OF CHARGE. THE SAFETY RECALL BEGAN DURING OCTOBER 2011. OWNERS MAY CONTACT MERCEDES-BENZ AT 1-800-367-6372.

08V465000SteeringSeptember 17, 2008 · 125,228 units

Defect

MERCEDES-BENZ IS RECALLING 125,228 MY 1998-2004 M-CLASS VEHICLES. THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE POWER STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THIS CONNECTION.

Consequence

THE LOSS OF POWER STEERING FLUID MAY RESULT IN DIMINISHED POWER STEERING OVER TIME AND ULTIMATELY CAN DAMAGE THE POWER STEERING PUMP. THIS COULD RESULT IN A LOSS OF CONTROL AND A CRASH WITHOUT WARNING.

Remedy

AN EARLIER RECALL REPAIR PERFORMED ON THESE VEHICLES MAY NOT BE SUFFICIENT TO PREVENT A FUTURE LEAKAGE OR FAILURE OF THE POWER STEERING HOSE CONNECTION (PLEASE SEE 03V121). SINCE IT IS NOT POSSIBLE THROUGH INSPECTION TO IDENTIFY SPECIFIC VEHICLES THAT MAY NOT HAVE BEEN PROPERLY REPAIRED, ALL VEHICLES REPAIRED PRIOR TO NOVEMBER 15, 2003, WILL BE REPAIRED AGAIN. THE RECALL IS EXPECTED TO BEGIN DURING NOVEMBER 2008. OWNERS MAY CONTACT MERCEDES-BENZ AT 1-800-367-6372.

03V121000SteeringMarch 27, 2003 · 211,000 units

Defect

ON CERTAIN PASSENGER VEHICLES, THE HOSE CLAMP USED TO SECURE THE POWER STEERING FLUID COOLING HOSE TO THE POWER STEERING FLUID COOLER MAY NOT PROVIDE SUFFICIENT CLAMPING FORCE FOR THIS CONNECTION.

Consequence

THE LOSS OF POWER STEERING FLUID MAY RESULT IN DIMINISHED POWER STEERING OVER TIME AND ULTIMATELY CAN DAMAGE THE POWER STEERING PUMP.

Remedy

DEALERS WILL INSTALL A NEW HOSE CLAMP ON THE POWER STEERING HOSE TO THE POWER STEERING COOLER. DURING CLAMP REPLACEMENT, THE POWER STEERING COOLING HOSE WILL BE INSPECTED AND REPLACED AS NECESSARY. OWNER NOTIFICATION BEGAN JUNE 16, 2003. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT MERCEDES-BENZ AT 1-800-367-6372.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“TL*THE CONTACT OWNS A 2003 MERCEDES-BENZ ML55. WHILE DRIVING 60 MPH HE ENGAGED THE SEAT HEATER. THE FRONT AND REAR SEATS BECAME EXTREMELY HOT. HE WAS UNABLE TO TURN THE HEATER OFF. HE PULLED OVER AND NOTICED SMOKE AND SPARKS. HE POURED WATER OVER THE SEATS AND THE SPARKS STOPPED. THE SEAT HEATER…”

Complaint filed with NHTSA · Electrical System · July 15, 2007 · fire

“TL*THE CONTACT OWNS A 2003 MERCEDES-BENZ ML55. WHILE DRIVING 60 MPH HE ENGAGED THE SEAT HEATER. THE FRONT AND REAR SEATS BECAME EXTREMELY HOT. HE WAS UNABLE TO TURN THE HEATER OFF. HE PULLED OVER AND NOTICED SMOKE AND SPARKS. HE POURED WATER OVER THE SEATS AND THE SPARKS STOPPED. THE SEAT HEATER…”

Complaint filed with NHTSA · Seats · July 15, 2007 · fire

“I WAS PULLING INTO A PARKING SPACE (WITH MY 3 SMALL CHILDREN STRAPPED IN THE BACK), WHEN I REALIZED THAT THE CAR WAS NOT STOPPING. I PRESSED THE BRAKE HARDER, THE CAR ACCELERATED, JUMPED THE CEMENT MEDIAN, AND HIT A PARKED CAR. THANK GOD NO ONE WAS INJURED. I AM SICK THINKING WHAT COULD OF…”

Complaint filed with NHTSA · Engine · September 7, 2003 · crash

“THE TRANSMISSION OF THE SUV "JAMMED" WHILE DRIVING ON THE FREEWAY, AND MY WIFE WHO WAS DRIVING THE VEHICLE ALMOST GOT INTO A ACCIDENT. THE SUV WAS PREVIOUSLY MAKING SUDDEN JUMPS WHILE AUTOMATICALLY SHIFTING THE GEARS. THE PROBLEM WAS REPORTED TO THE DEALER, BUT DEALER DID NOT DIAGNOSE THE…”

Complaint filed with NHTSA · Transmission · February 25, 2004

“HELLO, I HAVE RECENTLY PURCHASED A BRAND NEW MERCEDES ML500 TRUCK FROM MILLENNIUM IN BRIDGEWATER, NJ [PHONE]. THE PROBLEM I HAVE IS THAT ONE OF THE HEADLIGHTS IS DEFECTIVE AND HAS CONDENSATION BUILD IN IT ALL THE TIMES. WHILE THE DEALER SYMPTHISES WITH ME, THE DEALER REFUSES TO REPLACE IT BECAUSE…”

Complaint filed with NHTSA · Lighting · January 20, 2004

2003 Mercedes-Benz M-Class — common questions

Is the 2003 Mercedes-Benz M-Class reliable?

The record is thin — 12 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 3 recalls should be verified as completed.

What are the most common 2003 M-Class problems?

According to NHTSA complaint data, the leading problem areas are electrical system (4 complaints), engine (2 complaints), seats (2 complaints).

Does the 2003 Mercedes-Benz M-Class have recalls?

Yes — NHTSA lists 3 recall campaigns affecting the 2003 Mercedes-Benz M-Class. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Is the 2003 Mercedes-Benz M-Class under NHTSA investigation?

NHTSA opened one investigation into this model year; all are now closed.

Which Mercedes-Benz M-Class years should you avoid?

Based on complaint rates and open investigations, the M-Class years to avoid are 2000. The cleanest record among M-Class years belongs to 2004.

Related

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.