2007 Mercedes-Benz ML320 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2007 Mercedes-Benz ML320, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Engine526.3%
- Brakes315.8%
- Interior & seats315.8%
- Powertrain (other)210.5%
- Electrical210.5%
- Fuel system210.5%
- Steering15.3%
- Airbags15.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
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
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.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
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.
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.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
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.
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
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
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.
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 HAPPENED REPEATEDLY WHILE THERE. I CALLED THE MB DEALER IN DENVER WHO WAS SUPPOSED TO HAVE THE SERVICE DEPARTMENT CALL ME BACK - THEY NEVER DID. I WONDER IF IT HAS SOMETHING TO DO WITH A CHANGE IN ALTITUDE OR LOWER HUMIDITY (ELECTROSTATIC DISCHARGES)- PERHAPS EXTENDED DRIVING AS I DROVE 1,200 + MILES TO CO IN 20 HOURS STOPPING ONLY TWICE FOR FUEL AND ONCE FOR A HOTEL. ANY IDEAS FOLKS? *JS
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
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.
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 HAPPENED REPEATEDLY WHILE THERE. I CALLED THE MB DEALER IN DENVER WHO WAS SUPPOSED TO HAVE THE SERVICE DEPARTMENT CALL ME BACK - THEY NEVER DID. I WONDER IF IT HAS SOMETHING TO DO WITH A CHANGE IN ALTITUDE OR LOWER HUMIDITY (ELECTROSTATIC DISCHARGES)- PERHAPS EXTENDED DRIVING AS I DROVE 1,200 + MILES TO CO IN 20 HOURS STOPPING ONLY TWICE FOR FUEL AND ONCE FOR A HOTEL. ANY IDEAS FOLKS? *JS
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
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.
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.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
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 LEAK, SAME SPOT. OIL WAS DRIPPING FROM THE TURBO TO INTERCOOLER HOSE JOINT (WHICH WAS JUST ABOVE THE SERPENTINE BELT). I DID SOME RESEARCH ON THE INTERNET AND THE ONLY SIMILAR ISSUE I FOUND LED TO DTB S-B-09.20/29. I ASKED MERCEDES, BUT THEY SAY ITS NOT COVERED UNDER WARRANTY. SO I AM CURRENTLY RESEARCHING TO FIX THIS PROBLEM PERMANENTLY. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
STS light on with message saying Right curtain airbag malfunction visit workshop
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .