MERCEDES-BENZ ML350 · model year

2004 MERCEDES-BENZ ML350

44 NHTSA complaints, 3 crash reports for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 2004MERCEDES-BENZML350 carries 44 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 3 crashes, 3 fires, 3 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.

Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2004 ML350 is steering with 6 filings, followed by air bags (5) and electrical system (4). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.

NHTSA currently has 15 investigation files overlapping the 2004 ML350. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.

44
Complaints
3
Crashes
3
Fires
3
Injuries
0
Deaths

Total Complaints

44 filings

Crashes Reported

3 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
STEERING6
AIR BAGS5
ELECTRICAL SYSTEM4
SEATS4
ENGINE AND ENGINE COOLING2
UNKNOWN OR OTHER2
SERVICE BRAKES2
ENGINE2
FUEL/PROPULSION SYSTEM2
EXTERIOR LIGHTING2
STRUCTURE:BODY:BUMPERS1
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP1
FUEL SYSTEM, GASOLINE1
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP1
TIRES:TREAD/BELT1

Recent Complaints

20230322UNKNOWN OR OTHER

OEM jack failed without warning. No injuries but it could have been bad. Car got stuck and spinning wheels dug into a region of hard packed snow over a gravel driveway at my father's house. I was using the jack to lift the wheels out of their holes so I could fill the hole with chunks of wood. To spread the load on the snow the base of the jack was on a roughly 10" long piece of 2x4, which was placed on a roughly 8x10 inch piece of plywood. Jack worked fine for the first 2 wheels. On the 3rd wheel the "thrust washer" that transfers force from the nut that rides on the main screw, to the hinged arm which picks up the car, split in half without warning. This resulted in a sudden and complete failure of the jack, dropping the car back to it's starting position.

20210903FUEL/PROPULSION SYSTEM

Hello my check engine light is on in my 2004 Mercedes ml350 so I took it to a Mercedes dealership for inspection and repairs. They kept my suv for 8 days and finally called me back and said they believe the check engine light is on because I need to replace my charcoal canister shut off valve. Now this component takes the gas vapors that has not been burned off and reroutes it through the charcoal canister and back into the engine so it can be burnt off and not enter the atmosphere and enter the inside of the vehicle. Well My suv has failed inspection for emissions and that’s why I brought it in to Mercedes. Well the service department at Mercedes called me 8 days later and said Mercedes does not make that part anymore. And no other aftermarket company makes it either. They charged me $200 to tell me they can’t fix it because the part is not made anymore. So am I safe ? Why Mercedes never recalled a vehicle that can not pass states emissions test. I wrote a letter to the head of Me

20200614AIR BAGS

THE AIR BAG LIGHT CAME ON WHEN THE CAR HIT 170.000 MILES

Mileage: 178,000

20190516SEATS

FRONT SEATS GETS VERY HOT WHENEVER WE TURN ON THE SEAT WARMER OPTION. THIS STARTED TO HAPPEN AT LEAST FROM 5 TO 6 MONTHS. WE ARE SCARED IT MIGHT BURN OUR BACKS. THANKS

Mileage: 100,000

20180521STEERING

LEAKAGE OF POWER STEERING FLUID COMING FROM HOSES, OR PIPE, OR SOME CONNECTION. I WAS ABOUT TO LEAVE WHEN I STARTED MY CAR ONLY TO HEAR A LOUD WHINING NOISE AND A HARD-TO-TURN STEERING WHEEL.

Mileage: 162,000

20170918ELECTRICAL SYSTEM

DISCOVERED BRITTLE, BROKEN AND MISSING WIRING INSULATION ON THE HEADLIGHT WIRING INSIDE THE HEADLAMP ASSEMBLY. THIS WAS A DANGEROUS SITUATION THAT ALLOWED THE POSITIVE AND NEGATIVE WIRES TO COME IN CONTACT WITH EACH OTHER CREATING A SHORT.

20170918EXTERIOR LIGHTING

DISCOVERED BRITTLE, BROKEN AND MISSING WIRING INSULATION ON THE HEADLIGHT WIRING INSIDE THE HEADLAMP ASSEMBLY. THIS WAS A DANGEROUS SITUATION THAT ALLOWED THE POSITIVE AND NEGATIVE WIRES TO COME IN CONTACT WITH EACH OTHER CREATING A SHORT.

20161221ENGINE

TL* THE CONTACT OWNS A 2004 MERCEDES-BENZ ML350. WHILE DRIVING VARIOUS SPEEDS, THE POWER STEERING MALFUNCTIONED. THE STEERING WHEEL WAS DIFFICULT TO TURN AND THE STEERING FLUID HAD TO BE REPLACED SEVERAL TIMES. THE CONTACT STATED THAT THE STEERING WHEEL MADE A LOUD GRINDING NOISE WHEN IT WAS TURNED AND POWER STEERING FLUID LEAKED FROM THE COLUMN. IN ADDITION, THE CHECK ENGINE INDICATOR ILLUMINATED WITHOUT WARNING. IT WAS DIAGNOSED THAT THE POWER STEERING HOSE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000.

Mileage: 90,000

20161221STEERING

TL* THE CONTACT OWNS A 2004 MERCEDES-BENZ ML350. WHILE DRIVING VARIOUS SPEEDS, THE POWER STEERING MALFUNCTIONED. THE STEERING WHEEL WAS DIFFICULT TO TURN AND THE STEERING FLUID HAD TO BE REPLACED SEVERAL TIMES. THE CONTACT STATED THAT THE STEERING WHEEL MADE A LOUD GRINDING NOISE WHEN IT WAS TURNED AND POWER STEERING FLUID LEAKED FROM THE COLUMN. IN ADDITION, THE CHECK ENGINE INDICATOR ILLUMINATED WITHOUT WARNING. IT WAS DIAGNOSED THAT THE POWER STEERING HOSE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000.

Mileage: 90,000

20160317POWER TRAIN

TRANSMISSION DISENGAGES AT HIGHWAY SPEEDS

Mileage: 165,000

20160221ELECTRICAL SYSTEM

DURING A ROUTINE CHANGE OF A HEADLIGHT LAMP, THE MAINTENANCE TECHNICIAN DISCOVER THAT THE INSULATION ON ALL FOUR WIRES IN THE LEFT FRONT HEADLIGHT ASSEMBLY WERE CRACKED, DISINTEGRATING AND MISSING LEAVING THE BARE WIRES EXPOSED. THE MAINTENANCE TECHNICIAN WOULD NOT CHANGE THE BULB UNTIL A NEW WIRING HARNESS WAS FABRICATED AND THE DISCREPANCY WAS CORRECTED. THIS IS A DANGEROUS SITUATION. THE BARE WIRES ARE IN AN ENCLOSED HEADLAMP ASSEMBLY, CONTACTING FLAMMABLE MATERIALS. A SHORT IN THESE WIRES CAN LEAD TO SYSTEM FAILURES, OVERHEATING AND FIRE IN THE HEADLAMP AREA. RECOMMEND A RECALL FOR INSPECTION AND IF THIS DISCREPANCY IS DISCOVERED, RECOMMEND AN IMMEDIATE REPLACEMENT OF THE WIRES IN THE HEADLAMP ASSEMBLY.

Mileage: 96,000

20160221EXTERIOR LIGHTING

DURING A ROUTINE CHANGE OF A HEADLIGHT LAMP, THE MAINTENANCE TECHNICIAN DISCOVER THAT THE INSULATION ON ALL FOUR WIRES IN THE LEFT FRONT HEADLIGHT ASSEMBLY WERE CRACKED, DISINTEGRATING AND MISSING LEAVING THE BARE WIRES EXPOSED. THE MAINTENANCE TECHNICIAN WOULD NOT CHANGE THE BULB UNTIL A NEW WIRING HARNESS WAS FABRICATED AND THE DISCREPANCY WAS CORRECTED. THIS IS A DANGEROUS SITUATION. THE BARE WIRES ARE IN AN ENCLOSED HEADLAMP ASSEMBLY, CONTACTING FLAMMABLE MATERIALS. A SHORT IN THESE WIRES CAN LEAD TO SYSTEM FAILURES, OVERHEATING AND FIRE IN THE HEADLAMP AREA. RECOMMEND A RECALL FOR INSPECTION AND IF THIS DISCREPANCY IS DISCOVERED, RECOMMEND AN IMMEDIATE REPLACEMENT OF THE WIRES IN THE HEADLAMP ASSEMBLY.

Mileage: 96,000

20150915SERVICE BRAKES

TL* THE CONTACT OWNS A 2004 MERCEDES BENZ ML350. WHILE DRIVING 30 MPH, THE BRAKE PEDAL WAS DEPRESSED AND TRAVELED ALL THE WAY DOWN TO THE FLOORBOARD WITHOUT WARNING. THE CONTACT WAS ABLE TO STOP THE VEHICLE BY SLOWING DOWN ON A CURB. THE VEHICLE WAS TOWED TO THE DEALER, BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 10,040.

Mileage: 10,040

20150624FUEL/PROPULSION SYSTEM

CAR SUDDENLY DEVELOPED EXTREME GASOLINE ODOR AFTER A BRIEF 20 MILE TRIP. CURSORY CHECK DID NOT IDENTIFY SOURCE. UPON RETURN TRIP, SAME EXTREME SICKENING ODOR RETURNED. UPON PULLING INTO GARAGE GASOLINE WAS VISIBLY POURING FROM UNDERNEATH THE CAR AND POOLING ON GROUND. IT LOOKED TO BE COMING DIRECTLY FROM GAS TANK AREA BUT COULD NOT DETERMINE MAIN SOURCE AS IT WAS SPRAYED THROUGHOUT THE UNDERCARRIAGE. ASIDE FROM THE NAUSEA, THIS CLEARLY POSED A SIGNIFICANT FIRE DANGER AND WAS IMMEDIATELY TRANSPORTED TO THE DEALER AWAITING REPAIR COSTS NOW. THERE HAVE BEEN NO OTHER INCIDENTS OR EXTERNAL REASONS THAT MIGHT HAVE LED TO THIS (SUCH AS RUNNING OVER SOMETHING OR HITTING SOMETHING IN THE ROAD). AFTER DOING RESEARCH THIS APPEARS TO BE THE SAME TYPE OF PROBLEM THAT HAS BEEN, AND CONTINUES TO BE EXPERIENCED BY OTHER OWNERS DUE TO A MANUFACTURING DEFECT.

Mileage: 67,000

20150414STEERING

TL* THE CONTACT OWNS A 2004 MERCEDES BENZ ML350. WHILE DRIVING AT AN UNKNOWN SPEED, THE CONTACT HEARD A NOISE COMING FROM THE FRONT OF THE VEHICLE. THE VEHICLE WAS TAKEN TO A DEALER. THE TECHNICIAN DIAGNOSED THAT THE HOSE CLAMP NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE CONTACT WAS AWARE OF NHTSA CAMPAIGN NUMBER: 08V465000 (STEERING), BUT THE VIN WAS NOT INCLUDED. THE FAILURE MILEAGE WAS 100,000. UPDATED 06/13/17*LJ THE CONSUMER REQUESTED TO BE REIMBURSED FOR THE LEAKY STEERING FLUID REPAIRS. THE VEHICLE WAS REPAIRED USING THE SAME REQUIREMENTS AS THE RECALL, BUT WAS NOT REPAIRED UNDER THE RECALL. *JS

Mileage: 100,000

20150219FireENGINE

TL* THE CONTACT OWNS A 2004 MERCEDES BENZ ML350. THE CONTACT STATED THAT WHILE THE VEHICLE WAS IN PARK, THE CONTACT NOTICED FIRE COMING FROM THE ENGINE COMPARTMENT. THE FIRE DEPARTMENT EXTINGUISHED THE FIRE. A POLICE REPORT WAS FILED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 117,000.

Mileage: 117,000

20141001CrashAIR BAGS

SIDE-SWIPED ON THE FREEWAY. WITNESS STATE THE VEHICLE ROLLED 4-5 TIMES. NO FRONT OR SIDE AIRBAGS DEPLOYED. *TR

Mileage: 129,251

20130717SERVICE BRAKES

WHILE DRIVING ON A LOCAL STREET, I NOTICED THAT BRAKES HAD STOPPED WORKING. AFTER INVESTIGATION, I NOTICED THAT A CORRODED BRAKE LINE WAS LEAKING BRAKE FLUID. I HAD CONTACTED MERCEDES BENZ CUSTOMER SERVICE. I WAS TOLD TO CONTACT A DEALER, WHO CONFIRMED THAT ALL BRAKE LINES ARE CORRODING IN THE AREA CLOSE TO THE ENGINE COMPARTMENT. I WAS TOLD THAT THIS IS NOT A SAFETY ISSUE SUBJECT TO A RECALL. I WAS FURTHER TOLD THAT IT IS NORMAL FOR BRAKE LINES TO CORRODE AND LEAK. I HAVE NOT NOTICED CORROSION ON ANY OTHER PART OF THE CAR, EXCEPT THE BRAKE LINES. *TR

Mileage: 50,000

20120420STEERING

TL* THE CONTACT OWNS A 2004 MERCEDES ML350. WHILE PARKED, THE CONTACT NOTICED POWER STEERING FLUID WAS LEAKING FROM THE VEHICLE. THE CONTACT ALSO STATED THAT WHILE DRIVING APPROXIMATELY 30 MPH, THE STEERING WHEEL BECAME DIFFICULT TO MANEUVER. THE FAILURE OCCURRED AT DIFFERENT SPEEDS. THE VEHICLE WAS TAKEN TO THE DEALER. THE TECHNICIAN STATED THAT A DIAGNOSTIC TEST WAS NECESSARY TO LOCATE THE CAUSE OF THE FAILURE. THE CONTACT DID NOT HAVE THE FAILURE DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE VIN WAS NOT AVAILABLE. THE APPROXIMATE FAILURE MILEAGE WAS 90,000.

Mileage: 90,000

20120106CrashAIR BAGS

TL* THE CONTACT OWNED A 2004 MERCEDES BENZ ML350. THE CONTACT STATED THAT THE DRIVER WAS TRAVELING APPROXIMATELY 15 MPH WHEN SHE CRASHED INTO ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. THE VEHICLE WAS DESTROYED AND THE DRIVER SUFFERED INJURIES. THE VEHICLE WAS TOWED TO A TOWING YARD AND THE FAILURE WAS NOT DIAGNOSED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE AND THE CURRENT MILEAGES WERE 55,000. UPDATED 01/27/12 *BF

Mileage: 55,000

Compare 2004MERCEDES-BENZML350 to Similar Vehicles

NHTSA Investigations

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Frequently Asked Questions

How many complaints does the 2004 MERCEDES-BENZ ML350 have?
The 2004 MERCEDES-BENZ ML350 has 44 NHTSA complaints, 3 crashes, 3 fires, 3 injuries, and 0 deaths reported.
What are the most common problems with the 2004 MERCEDES-BENZ ML350?
The most-complained component for the 2004 MERCEDES-BENZ ML350 is STEERING with 6 complaints. Other frequently reported areas include AIR BAGS and ELECTRICAL SYSTEM.
Is the 2004 MERCEDES-BENZ ML350 safe to buy?
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.

Vehicle Safety Guides

Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.