Total Complaints
42 filings
MERCEDES-BENZ ML320 · model year
42 NHTSA complaints for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2009MERCEDES-BENZML320 carries 42 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 3 fires, 0 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 2009 ML320 is engine with 6 filings, followed by fuel system, diesel (5) and power train (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 2009 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.
Total Complaints
42 filings
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| ENGINE | 6 |
| FUEL SYSTEM, DIESEL | 5 |
| POWER TRAIN | 4 |
| ELECTRICAL SYSTEM | 3 |
| AIR BAGS | 3 |
| ENGINE AND ENGINE COOLING | 2 |
| FUEL SYSTEM, GASOLINE | 2 |
| ENGINE AND ENGINE COOLING:ENGINE:DIESEL | 2 |
| FUEL/PROPULSION SYSTEM | 2 |
| UNKNOWN OR OTHER | 2 |
| STRUCTURE:BODY | 2 |
| TRAILER HITCHES | 1 |
| TIRES | 1 |
| EXTERIOR LIGHTING | 1 |
| LATCHES/LOCKS/LINKAGES:DOORS:LATCH | 1 |
The contact owns a 2009 Mercedes-Benz ML320. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Rear coil springs rusted through and broke resulting in greatly diminished vehicle stability, especially in emergency maneuvers. Have had numerous repair facilities evaluate, including the dealer. All have refused to replace rear springs due to safety risk
Rear coil springs rusted through and broke resulting in greatly diminished vehicle stability, especially in emergency maneuvers. Have had numerous repair facilities evaluate, including the dealer. All have refused to replace rear springs due to safety risk
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.
Mileage: 89,000
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.
Mileage: 89,000
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.
Mileage: 89,000
ISSUES WITH SUNROOF MB HAS DONE A RECALL ON ALL MODELS OTHER THAN "M" CLASS I'M HAVING ISSUES WITH MY 2009 ML 320
Mileage: 100,000
TL* TAKATA RECALL. THE CONTACT OWNS A 2009 MERCEDES-BENZ ML320. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 16V081000 (AIR BAGS); HOWEVER, THE PARTS TO DO THE REPAIR WERE UNAVAILABLE. THE DEALER (COURTESY AUTOMOTIVE CENTER, (530) 345-9444) WAS CALLED AND CONFIRMED THAT THE PARTS WERE NOT AVAILABLE FOR THE RECALL REMEDY. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE AND CONFIRMED THAT PARTS WERE NOT AVAILABLE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. PARTS DISTRIBUTION DISCONNECT.
TAKATA RECALL - ALL THE MERCEDES BENZ LOCATIONS I CALLED (PORTLAND, BEAVERTON, TIGARD, HILLSBOROUGH AND WILSONVILLE), ARE NOT ACCEPTING TO REPLACE THE DEFECTIVE EQUIPMENT AS THEY CLAIM THEY DO NOT HAVE THE REQUIRED PARTS TO DO IT.
CPSC:2009 MERCEDES BENZ ML320 WITH APPROVED, DEALER INSTALLED TRAILER TOW HITCH PURCHASED USED ON 9/05/2017. RATED CAPACITY IS 7200 LBS. ON MONDAY, 9/11/2017, ATTACHED AN 2005 AIRSTREAM TRAILER, WEIGHING 5240 LBS. , MOVING OUT OF DRIVEWAY, HEARD A LOUD "POP" SOUND. .ON 9/22/2017, AND CONFIRMED AS FAULTY, DUE TO LACK OF PENETRATION AT THE POINT OF WELDS. *BF...UPDATED 11/14/17 *BF UPDATED 10/16/2017*JS UPDATED 7/27/18*JB
Mileage: 84,251
CPSC:2009 MERCEDES BENZ ML320 WITH APPROVED, DEALER INSTALLED TRAILER TOW HITCH PURCHASED USED ON 9/05/2017. RATED CAPACITY IS 7200 LBS. ON MONDAY, 9/11/2017, ATTACHED AN 2005 AIRSTREAM TRAILER, WEIGHING 5240 LBS. , MOVING OUT OF DRIVEWAY, HEARD A LOUD "POP" SOUND. .ON 9/22/2017, AND CONFIRMED AS FAULTY, DUE TO LACK OF PENETRATION AT THE POINT OF WELDS. *BF...UPDATED 11/14/17 *BF UPDATED 10/16/2017*JS UPDATED 7/27/18*JB
Mileage: 84,251
DEALER INSTALLED FLEX-N-GATE TRAILER HITCH, NOT CURRENTLY INCLUDED IN RECALL CAMPAIGN 08V242000. HAVE EXPERIENCED IDENTICAL WELD FAILURE, AS DESCRIBED IN RECALL INFORMATION. WOULD LIKE TO REQUEST EXPANSION OF RECALL TO INCLUDE 2009 MODELS.
Mileage: 94,542
I WAS SOLD THIS VEHICLE ON FEBRUARY 27, 2016, AFTER THE RECALL NOTICE WAS RELEASED. THE DEALER DID NOT MENTION A RECALL, AND I HAD NO KNOWLEDGE OF A RECALL UNTIL SEARCHING TODAY. SHOULDN'T THE DEALERSHIP HAVE INFORMED ME OF THE RECALL? DO THEY HAVE ANY CULPABILITY FOR NOT SHARING THIS INFORMATION.
Mileage: 99,000
TL* THE CONTACT OWNS A 2009 MERCEDES-BENZ ML320. AFTER FUELING THE VEHICLE, THE CONTACT NOTICED THAT THE VEHICLE WAS LEAKING FUEL BADLY. THE FIRE DEPARTMENT REMOVED SOME OF THE FUEL BEFORE THE VEHICLE WAS TOWED. THE FAILURE RECURRED FOUR TIMES. THE VEHICLE WAS TOWED TO A DEALER WHERE IT WAS DIAGNOSED THAT THE FUEL SENDER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED; HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 58,000.
Mileage: 58,000
ENGINE COOLER SEAL LEAKING MASSIVELY AND LEAKING OIL IN TURBO.
ENGINE COOLER SEAL LEAKING MASSIVELY AND LEAKING OIL IN TURBO.
ENGINE LIGHT CODE RELATED TO DEFECTIVE HEATER ELEMENT IN BLUETEC FLUID TANK. MERCEDES STATES IT IS AN EMISSIONS SYSTEM BUT IS NOT COVERED UNDER EMISSIONS WARRANTY. NO CHANGE IN VEHICLE PERFORMANCE, 35,000 MILES.
Mileage: 35,000
OIL LEAKING FROM COIL COOLER, 1-2OZ OVERNIGHT ON GROUND + OIL LOSS AT SPEED.
Mileage: 100,000
WHEEL SPEED SENSOR (L/F) FAILED ON HIGHWAY AT 50MPH. ALL BRAKES LOCKED UP AND CAR SKIDDED TO A HALT! LUCKILY NO TRAFFIC OR SOMEONE COULD HAVE BEEN KILLED! CAR HAD TO BE TOWED TO A LOCAL MB DEALER. MERCEDES IS AWARE OF THIS ISSUE ... THEY HAVE UPDATED THESE SENSORS BUT ARE NOT REPLACING THEM UNDER WARRANTY (AND OF COURSE THEY ARE GETTING ABOUT $450 PER SENSOR)! MAJOR SAFETY ISSUE! MERCEDES SHOULD RECALL AND REPLACE THESE SENSORS!
Mileage: 45,520
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
Mileage: 60,000
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.
Read our methodology — how this data is sourced, computed, and verified.