RoadVitals

2009 Mercedes-Benz ML320 Engine Problems

Owner-reported complaints naming the engine system, filed with NHTSA

Data refreshed

Engine reportsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
9
Latest Feb 9, 2020
Share of all reportsThis category as a share of every owner report on file for this model year. One report can name more than one component, so the categories overlap.
32%
of 28 total
Crash or fire reportedReports in this category whose submitter recorded that a crash or a fire occurred. The reporter's own answer on the NHTSA form, not a verified finding.
1
Injuries or deaths reportedTotals the submitters entered on their own reports in this category. Not verified by NHTSA and not a casualty statistic.
0

What this page shows

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components. Every record below is an owner-reported complaint about the 2009 Mercedes-Benz ML320 submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 9 reports on file name it.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Owner reports naming engine

Shown in the owner’s own words, exactly as filed

Body & structureElectricalEngine
Filed Feb 9, 2020
Fire reported

OUR VEHICLE CAUGHT FIRE. MY WIFE AND I HAD JUST GOTTEN OFF OF THE INTERSTATE WHEN WE STARTED TO SMELL AN ODD SMELL. WE PULLED INTO A HOTEL PARKING LOT WHERE WE STARTED TO SEE SMOKE COMING FROM THE FRONT OF THE VEHICLE. I STOPPED THE VEHICLE IN A HOTEL DRIVEWAY, PUT THE VEHICLE IN PARK. WE GOT OUT OF THE VEHICLE AND SAW FLAMES UNDERNEATH THE VEHICLE. WE CALLED 911 AND HOTEL STAFF TRIED TO EXTINGUISH THE FIRE BUT IT CONTINUED TO GROW. THE FIRE DEPT. ARRIVED AND PUT OUT THE FIRE. PHOTOS ARE ATTACHED.

NHTSA ID
11308022
Incident
Feb 8, 2020
Mileage
89,000 mi
EnginePowertrain (other)
Filed Feb 5, 2016

ENGINE COOLER SEAL LEAKING MASSIVELY AND LEAKING OIL IN TURBO.

NHTSA ID
10824460
Incident
Jan 20, 2016
Engine
Filed Sep 13, 2015

OIL LEAKING FROM COIL COOLER, 1-2OZ OVERNIGHT ON GROUND + OIL LOSS AT SPEED.

NHTSA ID
10763385
Incident
Sep 11, 2015
Mileage
100,000 mi
EngineInterior & seatsVisibility
Filed Feb 17, 2015

TL* THE CONTACT OWNS A 2009 MERCEDES BENZ ML320. WHILE DRIVING APPROXIMATELY 60 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE RESTARTED AFTER SEVERAL ATTEMPTS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO STATED THAT THE CAMSHAFT POSITION SENSOR FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 60,000. UPDATED 4/30/15*CN THE CONSUMER ALSO STATED THE GLOW PLUG CONTROL UNIT, HEAT ELEMENT AND DOOR LOCK FAILED. UPDATED 05/07/15*JB

NHTSA ID
10683919
Incident
Feb 1, 2015
Mileage
60,000 mi
EngineFuel system
Filed Jan 12, 2015

CHECK ENGINE LIGHT WARNING WITH CODE #20BE1B. REPAIR INDICATES NEED OF DIESEL EXHAUST FLUID (DEF) HEATER REPAIR KIT. DIESEL EXHAUST FLUID SYSTEM IS PART OF EMISSIONS SYSTEM. MB DEALERSHIP SAYS NO WARRANTY FOR REPAIR. INTERNET RESEARCH WIDESPREAD PROBLEM WITH DEF SYSTEM AROUND 50,000 MILES. *TR

NHTSA ID
10672030
Incident
Jan 2, 2015
Mileage
58,331 mi
EnginePowertrain (other)
Filed Feb 20, 2014

ML320 BLUETEC, RANDOMLY LOSES POWER. THE POWER WILL BE RESTORED ONCE THE CAR IS TURNED OFF AND ON AGAIN. CAR HAS BEEN TO THE DEALER 7 TIMES FOR REPAIR OF THIS ONE ISSUE, INCLUDING TWICE IN A STATE WITH LIMITED POWER. DEALER HAS DONE MULTIPLE SOFTWARE UPDATES, TURBO REPLACEMENT, EXHAUST VALVES REPLACEMENT AND THE ISSUE IS STILL PRESENT. ON ONE OF THE LAST OCCASIONS THIS HAPPENED, THE CAR LOST POWER WHEN TRYING TO MERGE ON TO THE HWY. THIS ALMOST RESULTED IN ME BEING REAR ENDED BY A BIG RIG. LUCKILY I WAS ABLE TO PULL TO THE SHOULDER BEFORE I WAS REAR ENDED. THIS IS SERIOUS SAFETY CONCERN THAT NEEDS TO BE ADDRESSED AND RECTIFIED. AS OF 02/17/2014 THIS ISSUE HAS NOT BEEN CORRECTED. *TR

NHTSA ID
10565170
Incident
Apr 15, 2012
Mileage
24,000 mi
EngineFuel systemPowertrain (other)
Filed Jan 22, 2014

THIS CAR SHOULD QUALIFY AS A LEMON. WE SPENT OVER $65K ON IT NEW IN JANUARY OF 2009 AND IT HAS EASILY COSTS US $65K TO KEEP IT RUNNING SINCE. SOMETHING SIGNIFICANT BREAKS ON IT EVERY 60 DAYS SINCE OWNING IT. THE TURBO WENT OUT MOST RECENTLY AFTER A BAD OIL SEAL LET OIL INTO IT. $6500! THE CAR MAY HAVE SADLY BEEN CURSED SINCE DAY ONE. OUR SALES PERSON AT MERCEDES BENZ OF SF DIED RIGHT AFTER WE BOUGHT IT. THINGS STARTED TO BREAK IMMEDIATELY AFTER. PEOPLE RAN INTO IT, ETC. IT HAS BEEN THE WORST CAR OWNER EXPERIENCE IN MY LIFE. *TR

NHTSA ID
10561052
Incident
Jan 15, 2009
EngineFuel system
Filed Oct 18, 2012

LETTER FROM REGARDING NUMEROUS ISSUES AND TROUBLES HE HAS FACED SINCE THE PURCHASE OF HIS MERCEDES-BENZ VEHICLE, A 2009 ML320 BLUE TEC DIESEL ENGINE SUV; SEEKING ASSISTANCE-HE WOULD LIKE ACKNOWLEDGEMENT OF RECEIPT OF THIS COMPLAINT *TGW THE CONSUMER STATED THE FIRST PROBLEM HE ENCOUNTERED WITH THE VEHICLE WAS IN MAY OF 2010, WITHIN LESS THAN A YEAR OF PURCHASE, WHILE DRIVING, THE GAS GAUGE ALL OF A SUDDEN WENT FROM A HALF TANK OF FUEL, TO READING EMPTY, WHERE AT THAT POINT THE FUEL LIGHT ILLUMINATED. EVEN THOUGH HE KNEW THE TANK WAS NOT EMPTY, HE STOPPED TO THE GAS STATION AND RE-FUELED. HOWEVER, THE TANK CONTINUED TO READ EMPTY. ABOUT AN HOUR LATER, THE NEEDLE MOVED TO THE FULL POSITION. FOUR TO FIVE MONTHS LATER, THE CHECK ENGINE LIGHT ILLUMINATED, ALONG WITH A BLUE WARNING LIGHT. THE VEHICLE WAS TAKEN TO THE DEALER, BUT NOTHING WAS FOUND TO BE WRONG. ON ANOTHER OCCASION, THE VEHICLE LOST ACCELERATION AS THE CONSUMER WAS ATTEMPTING TO GO UPHILL ON AN INCLINE. THE VEHICLE STARTED TO SLOW DOWN IN SPEED. EVEN TRYING TO PUMP THE ACCELERATOR PEDAL DID NOT HELP AND EVENTUALLY THE VEHICLE STARTED TO STALL. THE CONSUMER EXPERIENCED THE SAME FAILURE, SEVERAL MORE TIMES AFTER THAT. THE CHECK ENGINE LIGHT ILLUMINATED SEVERAL OTHER TIMES AS WELL. THE DEALER CHANGED THE ENTIRE COMPUTER MODULE. SOON AFTER, THE TIRE PRESSURE LIGHT ILLUMINATED. ONCE THE TIRES WERE CHECKED, THE LIGHT NO LONGER APPEARED.

NHTSA ID
10481822
Incident
May 1, 2010
Engine
Filed Oct 4, 2010

THE SUV SLOWS AND/OR STALLS SUDDENLY AT DIFFERENT SPEEDS. STARTED AROUND 8,000 ORIGINAL MILES ON ODOMETER. IT IS A 2009 ML 320 BLUETEC. OCCURS UNEXPECTEDLY FOR FEW SECONDS RANDOMLY. *TR

NHTSA ID
10359031
Incident
Jan 7, 2010
Mileage
8,000 mi

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.

Other components reported on this vehicle

Categories with enough reports to have a page of their own

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .