AutoDefect IQ

2003 Mercedes Benz M Class problems, complaints & recalls

Most-reported problem areas: Electrical System (2) · Steering:hydraulic Power Assist:hose, Piping, And Connections (1) · Seats:front Assembly:seat Heater/Cooler (1)

🧭 Reliability snapshot

97 /100
✓ Typical or better for this model

Compared against other Mercedes Benz M Class model years — complaint volume vs the model's median year, recalls and severity. How we score →

10
Complaints
1
Recalls
3
Service bulletins
1
Crashes reported
1
Fires reported
0
Deaths

Safety recalls (1)

Vehicle Speed Control:cruise Control 2011-03-31 · campaign 11V208000 · 136,751 vehicles

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

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

Fix: 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.

Service bulletins (3)

Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.

Steering:hydraulic Power Assist:hose, Piping, And Connections 2013-02-15 · TB-46-30-13-B · Service Bulletin/Repair Instructions

mercedes: see document search button for owner letter. the lower power steering hose and clamp should be replace, under extended warranty, due to power steering leakage from connection to power steering cooler. models 1998-2003 163.154, (ml320, 430, 55, 500, 350). *pe

Electrical System 2005-05-16 · 424562 · Service Bulletin/Repair Instructions

esp lamp illuminated. *tt

Engine And Engine Cooling:engine 2005-02-07 · 805732 · Service Bulletin/Repair Instructions

engine will not start and fault message start error appears in instrument cluster. *tt

What owners report

2011-10-17 · Engine And Engine Cooling

“after changing the serpentine belt, i have noticed that the crankshaft pulley was wobbling and the belt vibrating, i been doing some research and found that there has been a recalled for this issue, dose mine still applied to this problem? it is already out of warranty but this kind of repair is expensive, please. *tr…”

2010-11-03 · Fuel System, Gasoline · 42,000 mi

“while driving in moderate traffic engine stopped. driver (not me) was very scared and said an accident almost occurred as she maneuvered to breakdown lane without power and no power steering. second occurrence of sudden engine stoppage while driving with loss of engine power and power steering in this vehicle. fuel pump had been previously repla…”

2007-08-14 · Seats:front Assembly:seat Heater/Cooler · 28,000 mi · 🔥 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 did not go off until the key was removed from …”

2006-03-14 · Steering:hydraulic Power Assist:hose, Piping, And Connections · 24,368 mi

“dt*: the contact stated while driving at 30 mph going around a curve the steering became difficult and then locked. the vehicle was towed to the dealership for inspection and determined there was nhtsa recall #03v121000 for the steering hydraulic power assist hose, piping and connections. the hose clamp on the power steering hose was replaced.…”

2005-05-13 · Seats · 25,000 mi

“- no precursors or apparent damage - drivers seat heater failed resulting in strong burning smell, and superficial burn to left upper leg of driver…”

2004-04-08 · Electrical System · 24,300 mi

“on the highway driving 65 my 2003 ml500 mercedes - benz computer shut down after hitting a small bump. it was very dangerous and was scared for my life there engine turned off and was luckily able to stop at the side of the road and start the car again. this happened a couple of weeks before but it stoped for just a second or two. this isn;t an ld …”

2004-03-04 · Power Train:automatic Transmission · 20,000 mi

“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 transmission problem correctly. now the vehicle is with t…”

2004-01-28 · Exterior Lighting:headlights

“hello, i have recently purchased a brand new mercedes ml500 truck from millennium in bridgewater, nj 908-685-0800. 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 mercedes would not pay for it. mercedes say…”

2003-10-30 · Electrical System · 7,000 mi

“i purchased a new 2003 ml 350 during the memorial day sale from our local mercedes dealer in iowa city, ia. the suv shuts off automatically. initially, the dealer replaced the battery. the suv has been into the dealer three additional times for the same problem. each time, the day after i received the ml350 back, the problem occurs again. two…”

2003-09-16 · Engine And Engine Cooling:engine · 10,744 mi · 💥 crash

“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 happened. the car is 6 months old and has been back to t…”

Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.

Other Mercedes Benz M Class years