MERCEDES-BENZ ML320 · model year

2007 MERCEDES-BENZ ML320

20 NHTSA complaints for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 2007MERCEDES-BENZML320 carries 20 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 2 fires, 1 injury, 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 2007 ML320 is engine and engine cooling with 3 filings, followed by seats (3) and electrical system (2). 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 2007 ML320. 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.

20
Complaints
0
Crashes
2
Fires
1
Injuries
0
Deaths

Total Complaints

20 filings

Crashes Reported

0 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
ENGINE AND ENGINE COOLING3
SEATS3
ELECTRICAL SYSTEM2
POWER TRAIN2
SERVICE BRAKES, HYDRAULIC2
STEERING1
ENGINE AND ENGINE COOLING:ENGINE1
FUEL SYSTEM, GASOLINE1
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)1
AIR BAGS1
AIR BAGS:SIDE/WINDOW:CURTAIN1
SERVICE BRAKES1
FUEL/PROPULSION SYSTEM1

Recent Complaints

20230119ELECTRICAL SYSTEM

My 2007 MB ML320 CDI has problem with water entering where spare tire located,after rain or when i use car wash.It builds inside so much water that module for for fuel pump stopped working,all wires were corroded,I paid for repairs from my pocket because MB dealership refused to fix my vehicle even they new MB ML/GL models have issue with water entering spare tire area.Now I find out they have recall with over323,000 ML/GL models.Recall number22v-955.I would like to file this complaint because dealership refuses to cover my previous repairs.Water still entering trunk area,and I have to constantly drain and vacuum trunk area.I hope you will have another recall or add older MB ML/GL to recent recall list.Thanks.

20230119FUEL/PROPULSION SYSTEM

My 2007 MB ML320 CDI has problem with water entering where spare tire located,after rain or when i use car wash.It builds inside so much water that module for for fuel pump stopped working,all wires were corroded,I paid for repairs from my pocket because MB dealership refused to fix my vehicle even they new MB ML/GL models have issue with water entering spare tire area.Now I find out they have recall with over323,000 ML/GL models.Recall number22v-955.I would like to file this complaint because dealership refuses to cover my previous repairs.Water still entering trunk area,and I have to constantly drain and vacuum trunk area.I hope you will have another recall or add older MB ML/GL to recent recall list.Thanks.

20221024POWER TRAIN

The vehicle would suddenly stop shifting or shift into neutral. This could happen at freeway speeds, where it would suddenly not have any power and just coast or it could be stuck in 4th at a stoplight and not be able to move.

20221013SERVICE BRAKES

Premature line corrosion on all of the steel hard lines. The brake lines are corroded and blistered and one of the lines are leaking fluid.

20220906AIR BAGS

STS light on with message saying Right curtain airbag malfunction visit workshop

20220906AIR BAGS:SIDE/WINDOW:CURTAIN

STS light on with message saying Right curtain airbag malfunction visit workshop

20220802SERVICE BRAKES, HYDRAULIC

The contact owns a 2007 Mercedes-Benz ML320. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulics) however, the part to do the recall repair was not yet available. The dealer was made aware of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had not experienced a failure. Parts distribution disconnect.

20220608SERVICE BRAKES, HYDRAULIC

The contact owns a 2007 Mercedes-Benz ML320. The contact was made aware of NHTSA Campaign Number: 22V315000 (Service Brake, Hydraulic) however, the part to do the recall repair was not yet available. The local dealers Mercedes-Benz of Seattle (2025 Airport Way S, Seattle, WA 98134:(206) 324-5959) and Mercedes-Benz of Lynnwood (17800 Hwy 99, Lynnwood, WA 98037:(425) 409-2574) were contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

20180501FireENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

TL* THE CONTACT OWNS A 2007 MERCEDES-BENZ ML320. WHILE THE CONTACT WAS MERGING INTO HIGHWAY TRAFFIC, WHITE AND GRAY WAS SEEN UNDER THE HOOD OF THE VEHICLE. THE CONTACT PULLED THE VEHICLE OVER TO THE SIDE OF THE ROAD AND TURNED OFF THE ENGINE. PRIOR TO THE FAILURE, THE VEHICLE HESITATED WHILE DRIVING. THE CONTACT POINTED OUT THAT THE VEHICLE WAS EQUIPPED WITH A DIESEL ENGINE. THE VEHICLE WAS TOWED TO THE DEALER (MERCEDES-BENZ OF ANNAPOLIS, 324 6TH ST. ANNAPOLIS, MD 21403, (888) 261-7620) WHERE IT WAS DIAGNOSED WITH CATASTROPHIC ENGINE FAILURE. THE EXHAUST MANIFOLD RUPTURED, WHICH CAUSED THE ENGINE WIRING HARNESS TO MELT. THE DEALER INFORMED THE CONTACT THAT 'THE VEHICLE WAS DONE'. THE CONTACT'S INSURANCE COMPANY WAS NOTIFIED AND THE VEHICLE WAS AWAITING INSPECTION TO DETERMINE IF THE VEHICLE WAS A TOTAL LOSS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 224,000. *TT

Mileage: 224,000

20160311SEATS

SEAT BACK WARMER OVERHEATS/BURNS SMALL BURN - THE DRIVERS SIDE SEAT SEAT WARMER BURNED A WHOLE THROUGH THE MATERIAL AND THROUGH MY WIFE JACKET CAUSING A SMALL BURN ABOVE HER LEFT LEG. BASICALLY A THERMAL INCIDENT IN WHICH THE SEAT HAS A HOLE THE SIZE OF A QUARTER BURNED THROUGH THE SEAT COVER. WAS DRIVING HOME FROM WORK.

Mileage: 229,000

20140414ELECTRICAL SYSTEM

YEARS AGO, WHILE DRIVING THROUGH NEW MEXICO, MY DASH AND COMMAND CENTER FLASHED OFF AND REBOOTED. IT WAS A LITTLE CONCERNING BECAUSE WE WERE USING THE GPS EXCLUSIVELY FOR OUR DIRECTIONS. THERE WAS ALSO A TRANSMISSION WARNING LIGHT THAT CAME ON WARNING US TO GET TO THE NEAREST DEALER, WITHOUT SHIFTING GEARS. THIS HAPPENED PERHAPS 10-15 TIMES UNTIL I WAS ABLE TO DETOUR TO THE MB DEALER IN ALBUQUERQUE - ABSOLUTELY WONDERFUL PEOPLE. THEY TOLD ME THAT IT WOULD SOUND STRANGE BUT THE PROBLEM WAS CAUSED BY A FAULTY GLOW PLUG SENSOR OR MODULE - WHICH THEY DIDN'T HAVE IN STOCK. SINCE OUR DESTINATION WAS L.A., THEY CALLED AHEAD TO MB OF BEVERLY HILLS (BH), (ALSO WONDERFUL PEOPLE) TO CHECK IF THEY HAD ONE. THEY (MB OF BH) COULDN'T FIND ANY OTHER TROUBLE CODES EXCEPT A FEW POWER SPIKES SO THEY REPLACED THE ALTERNATOR, UNDER WARRANTY. THEY EVEN RUSHED IT DUE TO A FAMILY EMERGENCY BACK HOME. IT HAPPENED ON THE WAY BACK SEVERAL TIMES, THEN DIDN'T HAPPEN AGAIN UNTIL I DROVE TO COLORADO IN 2013. IT H

Mileage: 50,000

20140414POWER TRAIN

YEARS AGO, WHILE DRIVING THROUGH NEW MEXICO, MY DASH AND COMMAND CENTER FLASHED OFF AND REBOOTED. IT WAS A LITTLE CONCERNING BECAUSE WE WERE USING THE GPS EXCLUSIVELY FOR OUR DIRECTIONS. THERE WAS ALSO A TRANSMISSION WARNING LIGHT THAT CAME ON WARNING US TO GET TO THE NEAREST DEALER, WITHOUT SHIFTING GEARS. THIS HAPPENED PERHAPS 10-15 TIMES UNTIL I WAS ABLE TO DETOUR TO THE MB DEALER IN ALBUQUERQUE - ABSOLUTELY WONDERFUL PEOPLE. THEY TOLD ME THAT IT WOULD SOUND STRANGE BUT THE PROBLEM WAS CAUSED BY A FAULTY GLOW PLUG SENSOR OR MODULE - WHICH THEY DIDN'T HAVE IN STOCK. SINCE OUR DESTINATION WAS L.A., THEY CALLED AHEAD TO MB OF BEVERLY HILLS (BH), (ALSO WONDERFUL PEOPLE) TO CHECK IF THEY HAD ONE. THEY (MB OF BH) COULDN'T FIND ANY OTHER TROUBLE CODES EXCEPT A FEW POWER SPIKES SO THEY REPLACED THE ALTERNATOR, UNDER WARRANTY. THEY EVEN RUSHED IT DUE TO A FAMILY EMERGENCY BACK HOME. IT HAPPENED ON THE WAY BACK SEVERAL TIMES, THEN DIDN'T HAPPEN AGAIN UNTIL I DROVE TO COLORADO IN 2013. IT H

Mileage: 50,000

20120501ENGINE AND ENGINE COOLING

TL* THE CONTACT OWNS A 2007 MERCEDES BENZ ML320. THE CONTACT WAS DRIVING 55 MPH WHEN THE CHECK ENGINE WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS WHERE THE DEALER STATED THAT THE EMISSION CONTROL NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS CONTACTED AND ADVISED THAT THERE WAS NO DEFECT FOUND WITHIN THE VEHICLE. THE FAILURE AND CURRENT MILEAGE WAS 82,000.

Mileage: 82,000

20120410FUEL SYSTEM, GASOLINE

TL* THE CONTACT OWNS A 2007 MERCEDES-BENZ ML320 CDI. THE CONTACT STATED THAT THE FUEL TANK FAILED. WHILE A SERVICE STATION ADDED FUEL TO THE VEHICLE, HE NOTICED THAT FUEL WAS LEAKING TO THE GROUND. THE VEHICLE WAS THEN TAKEN TO THE DEALER. THE DEALER INSPECTED THE FUEL TANK AND FOUND A CRACKED ON THE FUEL TANK. THE DEALER STATED THAT THE FUEL TANK WOULD NEED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE AND CURRENT MILEAGES WERE 110,000.

Mileage: 110,000

20110328STEERING

I PURCHASED A USED 2007 MERCEDES ML320 CDI ON MARCH 12. AFTER A WEEK OF DRIVING - I INSPECTED THE ENGINE COMPARTMENT (I USUALLY DO). I NOTICED ENGINE OIL DRIPPING (SMALL BUT NOTICEABLE AMOUNT) ON THE SERPENTINE BELT. I DID NOT THINK IT WAS URGENT - SO I TOOK PICTURES SO I CAN SEND IT TO MY SELLER TO CLAIM WARRANTY. ON MARCH 23, I WAS DRIVING WITH MY FAMILY ON I-65. SUDDENLY, STEERING BECAME VERY HARD. IT WAS A CURVING HIGHWAY SO I WAS FORCED TO GO INTO OTHER LANES. LUCKY, TRAFFIC WAS NOT HEAVY SO I DID NOT SWERVE INTO ANY OTHER VEHICLE. I WAS ABLE TO WRESTLE WITH THE STEERING WHEEL ON TIME TO MOVE AWAY SAFELY. ALSO, AT THE SAME TIME WE LOST STEERING, THE BATTERY LIGHT WENT ON. AFTER STOPPING, WE POPPED THE HOOD AND IMMEDIATELY NOTICED THE SAME BELT MENTIONED EARLIER HAD DISINTEGRATED INTO SEVERAL PIECES. WE CALLED FOR A TOW VEHICLE. MERCEDES BENZ FIXED THE PROBLEM FOR $300 AND ASSURED ME THAT THERE IS NO OIL LEAK. 200 MILES LATER, I GOT HOME - AND SAW THE SAME

Mileage: 36,000

20110328ENGINE AND ENGINE COOLING:ENGINE

I PURCHASED A USED 2007 MERCEDES ML320 CDI ON MARCH 12. AFTER A WEEK OF DRIVING - I INSPECTED THE ENGINE COMPARTMENT (I USUALLY DO). I NOTICED ENGINE OIL DRIPPING (SMALL BUT NOTICEABLE AMOUNT) ON THE SERPENTINE BELT. I DID NOT THINK IT WAS URGENT - SO I TOOK PICTURES SO I CAN SEND IT TO MY SELLER TO CLAIM WARRANTY. ON MARCH 23, I WAS DRIVING WITH MY FAMILY ON I-65. SUDDENLY, STEERING BECAME VERY HARD. IT WAS A CURVING HIGHWAY SO I WAS FORCED TO GO INTO OTHER LANES. LUCKY, TRAFFIC WAS NOT HEAVY SO I DID NOT SWERVE INTO ANY OTHER VEHICLE. I WAS ABLE TO WRESTLE WITH THE STEERING WHEEL ON TIME TO MOVE AWAY SAFELY. ALSO, AT THE SAME TIME WE LOST STEERING, THE BATTERY LIGHT WENT ON. AFTER STOPPING, WE POPPED THE HOOD AND IMMEDIATELY NOTICED THE SAME BELT MENTIONED EARLIER HAD DISINTEGRATED INTO SEVERAL PIECES. WE CALLED FOR A TOW VEHICLE. MERCEDES BENZ FIXED THE PROBLEM FOR $300 AND ASSURED ME THAT THERE IS NO OIL LEAK. 200 MILES LATER, I GOT HOME - AND SAW THE SAME

Mileage: 36,000

20101202FireSEATS

DRIVER HEATED SEAT BACK CUSHION BURNED A HOLE THROUGH THE SEATBACK AND DRIVER'S COAT CAUSING HER TO SWERVE OFF ROAD ... NO COLLISION. CAR HAS 23,000 MILES AND WAS ONLY DRIVEN A MILE BEFORE INCIDENT. *TR

Mileage: 23,600

20090818ENGINE AND ENGINE COOLING

DEAR NHTSA, MY '07 MERCEDES ML-320-CD WAS BOUGHT 'NEW'. THE DEFECT OF A RUN-AWAY, HI RPM REVVING-UP OF THIS DIESEL ENGINE WAS FIRST EXPERIENCED APPROX 21/2 MONTHS AGO. IT HAPPENED SHORTLY AFTER HAVING IT PARKED AT A LOCAL SHOPPING CTR FROM WHICH I DROVE IT ONTO THE MAIN STREET ATA MODERATE SPEED OF LESS THAN 20 MPH. SUDDENLY THE ENGINE REVVED UP TO MAYBE 5 OR 6 000 RPM CAUSING THIS SUV ACCELERATE BEYOND CONTROL. I HAD TO USE BOTH OF MY FEET ON THE BRAKE PEDAL BEFORE PULLING OVER ONTO THE CURB WHERE I TURNED OFF THE IGNITION . AFTER THAT, THIS SUV WOULD NOT RESTART AGAIN FOR A WHILE, LIKE 20 OR 30 MINS. SINCE MY RESIDENCE WAS ONLY ABOUT 2 MILES AWAY , AND AFTER RE-STARTING IT I CHANCED DRIVING IT HOME. I HAVE REPORTED THIS INCIDENT TO THE MERCEDES HQ AT MONTVALE NJ VIA THE BUILT-IN SATELLITE SYSTEM AND SUBSEQUENTLY TO THE LUBBOCK, TX MERCEDES SERVICE CTR WHILE BEING THERE. THEY FOUND NOTHING WRONG AND SENT ME ON MY MERRY WAY BACK TO MY RESIDENCE IN ROSWELL, NM, ABOUT 200 MILES

Mileage: 16,000

20090307SEATS

ON 2/16/09 WHILE OUT DRIVING WE SMELLED AN ELECTRICAL BURNING ODOR INSIDE OUR 2007 ML320CDI JUST AS WE ARRIVED AT OUR DESTINATION. WE LOOKED AROUND THE VEHICLE AND UNDER THE HOOD TO TRY AND FIGURE OUT WHAT WAS BURNING AND FOUND NOTHING UNUSUAL. THE ODOR WAS GONE BY THE TIME WE GOT BACK IN THE VEHICLE. WE CONTINUED TO DRIVE THE VEHICLE WITH NO PROBLEMS AND NO ODORS UNTIL 2/21/09. ON THIS DAY WHILE RUNNING ERRANDS MY HUSBAND GOT OUT OF THE DRIVERS SEAT, CLOSED THE DOOR WHILE I REMAINED IN THE CAR AND I SAW THE DRIVERS SEAT BACK (NEAR THE DRIVER'S DOOR) START SMOKING. THE ELECTRIC HEATED SEATS WERE ON AT THE TIME. I IMMEDIATELY TURNED OFF THE HEAT TO THE SEATS AND THEN SHUT THE VEHICLE OFF. THERE WAS A BURN HOLE, ABOUT THE SIZE OF A NICKEL, IN THE SEAT CUSHION. ON MONDAY I CALLED OUR MERCEDES DEALERSHIP TO REPORT THE PROBLEM AND THEY TOLD ME TO BRING THE VEHICLE IN AS SOON AS POSSIBLE, BUT DO NOT USE THE HEATED SEATS UNTIL THEY CAN MAKE A REPAIR. WE TOOK THE VEHICLE TO THE DEALER

Mileage: 27,435

20071024ENGINE AND ENGINE COOLING

TL*THE CONTACT OWNS A 2007 MERCEDES BENZ ML320. WHILE DRIVING 60 MPH, ALL OF THE INTERIOR AND INSTRUMENT PANEL LIGHTS ILLUMINATED AND THEN THE ENGINE STOPPED. THE STEERING DIMINISHED AND IT BECAME VERY DIFFICULT TO MANEUVER THE VEHICLE. THE CONTACT PULLED OFF THE ROAD AND THE VEHICLE WAS TOWED TO THE DEALER. THE DEALER STATED THAT THE CRANK SHAFT SENSOR FAILED AND THEY REPLACED THE COMPONENT. THE CONTACT SPOKE WITH MERCEDES, BUT THEY WERE OF NO ASSISTANCE. THE CURRENT AND FAILURE MILEAGES WERE 5,400. THE CONSUMER ALSO ADDED BRAKING WAS DIMINISHED AS WELL. UPDATED

Mileage: 5,400

Compare 2007MERCEDES-BENZML320 to Similar Vehicles

NHTSA Investigations

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Frequently Asked Questions

How many complaints does the 2007 MERCEDES-BENZ ML320 have?
The 2007 MERCEDES-BENZ ML320 has 20 NHTSA complaints, 0 crashes, 2 fires, 1 injuries, and 0 deaths reported.
What are the most common problems with the 2007 MERCEDES-BENZ ML320?
The most-complained component for the 2007 MERCEDES-BENZ ML320 is ENGINE AND ENGINE COOLING with 3 complaints. Other frequently reported areas include SEATS and ELECTRICAL SYSTEM.
Is the 2007 MERCEDES-BENZ ML320 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.