2009 Mercedes-Benz ML350 Electrical system Problems
- Complaints
- 17about this part
- Share
- 18%of 93 total for the year
- Median mileage
- 104,284miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 17 complaints about the electrical system of the 2009 Mercedes-Benz ML350, 18% of the 93 complaints for this model year. Where a mileage was given, the median is 104,284 miles. 4 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The liftgate on my car quit working recently. I discovered that the liftgate motor was in a pool of water. There is a recall 09v076000 that is already issued for this problem. I am very concerned that this could cause a short circuit which could lead to a fire. For some reason my car is not on the recall list even though it is that model year and the exact problem as stated in the recall. Please advise.”
NHTSA complaint #11207940, filed 2019-05, 102,000 miles“My mercedes ML350 was parked on a residential street. Flames began shooting out of the right rear taillight. By the time that we saw it and extinguished it the entire back of the car was on fire and the car totaled.(matter of minutes) the fire department was called. I have pictures showing that fire came from the electrical panel in the right rear of the car. I had no previous indication other than a half an hour earlier the left rear taillight was stuck on. …”
NHTSA complaint #10558192, filed 2014-01, 45,000 miles“The back hatch on my 2009 mercedes ML350 would not open using the electronic key or the driver button in the door. There was a noise that sounded like it was opening, but the latch would not release the door. On multiple occasions my battery would suddenly be dead. I assumed I must have left a light on. It was not until I saw a complaint with NHTSA of the exact same problem that I realized that my unopened hatch was draining my battery. I have since had to replace my battery at an expense of over $300. Mercedes batteries are extremely expensive and can only be purchased at the mercedes dealer. …”
NHTSA complaint #10534063, filed 2013-08, 95,000 miles“Odometer Fraud. The contact purchased a 2009 Mercedes-Benz ML350. The contact stated that while an independent mechanic was servicing the vehicle, the mechanic informed the contact that there was a mileage discrepancy based on the Carfax history report. The vehicle was a dealer sale. At the time of purchase in October 2024, the vehicle mileage was 146,743; however, the Carfax history report displayed that the mileage was 196,577 on July 15, 2024, while an Auction company was still in possession of the vehicle.”
NHTSA complaint #11680606, filed 2025-08, 196,577 miles“2 issues: right side rear seat belt will not retract. Second; after a week in the dealership to fix an A/C unit that cuts out repeatedly, and the assurances that the new harness they installed would fix the problem, it hasn't. Even though the outside temps are not into triple digits, it will stop cooling and slowly the air temp rises. I thought that being in slow traffic was the reason, but on the open road and an oat of 74, it did it agsin.”
NHTSA complaint #10873875, filed 2016-06, 80,000 milesRelated service bulletins
- 11015640Mar 5, 2025Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 11008091Sep 28, 2024Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 10248173Dec 11, 2023Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (âÂÂMYâÂÂ) 2009-2012 GL-Class, ML-Class, R-Class, and…
- 10166088Jul 12, 2014Noises from the mounting of the rear weight sensing system (WSS) sensors
- 10165842Jul 10, 2014With an unfavorable sensor position and high rpms, the sensor may deliver incorrect rpm values and the transmission control unit may detect overspeeding. Owing to the software…
- 10165852Jul 9, 2014Noise in center console area of W166.
- 10165851Jul 8, 2014Side windows may make noises when closing and opening, or reverse direction when closing.
- 10165850Jul 8, 2014Side windows may make noises when closing and opening, or reverse direction when closing.
- 10167007Feb 25, 2014Engine diagnosis warning lamp active. Fault code 20BE1B and/or 20BD1B (The heating element of the AdBlue tank has a malfunction) is logged in the Blue-Tec control unit.
- 10167006Feb 12, 2014Engine diagnosis warning lamp active. Fault code 20BE1B and/or 20BD1B (The heating element of the AdBlue tank has a malfunction) is logged in the Blue-Tec control unit.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2015 | 4 | 8% |
| 2014 | 20 | 29% |
| 2013 | 11 | 19% |
| 2012 | 11 | 17% |
| 2011 | 16 | 14% |
| 2010 | 10 | 10% |
| 2009 | 17 | 18% |
| 2008 | 13 | 19% |
| 2007 | 19 | 23% |
| 2006 | 29 | 17% |
| 2004 | 4 | 11% |
| 2003 | 4 | 16% |
Other parts of the 2009 Mercedes-Benz ML350
40 complaintsSeat belts
18 complaintsBrakes
6 complaintsExterior lighting
5 complaintsFuel system
5 complaintsBody and structure
5 complaintsOther or unknown
2 complaintsSeats
1 complaintsSteering
1 complaintsSuspension
1 complaintsTransmission and drivetrain
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2009 Mercedes-Benz ML350
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology