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10.0

really awful
Crashes / Fires:
0 / 3
Injuries / Deaths:
0 / 0
Average Mileage:
69,060 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2009 Mercedes-Benz ML350 electrical problems

electrical problem

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2009 Mercedes-Benz ML350 Owner Comments

problem #13

Dec 292022

ML350

  • 140,000 miles

A D V E R T I S E M E N T S

The contact owned a 2009 Mercedes-Benz ML350. The contact stated while driving 45-50 MPH with his wife in the front passenger seat and his children in the rear seats, his wife smelled a strong burning odor and saw smoke coming from underneath the front passenger seat. There was no warning light illuminated. The contact immediately veered to the side of the road. Both the contact and his family exited the vehicle and ran away from the vehicle. The contact stated that approximately 30 seconds after exiting the vehicle, the vehicle caught on fire and exploded several times, causing a nearby tree to catch on fire. The contact was able to extinguish the fire with the assistance of the fire department. A fire department report was filed. A police report was filed. There were no injuries sustained. The vehicle was towed to a tow yard where it was awaiting to be totaled. The dealer was notified of the failure. The manufacturer was not notified of the failure. The failure mileage was approximately 140,000.

- Little Rock, AR, USA

problem #12

Oct 012018

ML350

  • miles
Driver side front door and driver side back door do not unlock or lock. You have to Manually unlock and lock.

- Colorado Springs, CO, USA

problem #11

Feb 062022

ML350

  • 104,284 miles
The contact owns a 2009 Mercedes Benz ML350. The contact stated that while attempting to open the door with the key fob, the fob failed to open the vehicle. In addition, the contact noticed that the headlights failed and the gas gauge also failed to operate as needed. The vehicle was taken to an independent mechanic where it was diagnosed that the rear Signal Acquisition Module (SAM) board was corroded, and the rear SAM module needed to be replaced. The dealer was not contacted. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 104,284.

- Royal Palm Beach, FL, USA

problem #10

May 062019

ML350

  • 116,500 miles

A D V E R T I S E M E N T S

Failing/faulty eis electronic ignition system. My vehicle has 117,000 miles and has intermittent ignition issues. I place the key in the ignition a message on the dash, "key does not belong to vehicle", car will not turn to start, takes several attempts to have car start. The Mercedes dealer in my area diagnosed the issues as needing to replace eis, electronic ignition system, est. Cost of $3,700. The issue has gone to intermittent to every time I try to start the vehicle. This car has low miles and has been dealer maintained. This should be a recall as defective product

- Bellevue, WA, USA

problem #9

May 032019

ML350

  • 102,000 miles
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.

- Thompsontown, PA, USA

problem #8

Feb 182018

ML350

  • 130,000 miles
The contact owns a 2009 Mercedes-Benz ML350. The contact stated that when the key fob was inserted in the ignition, the vehicle would not start and the 'key is not for this car' message appeared. The contact stated that the key had not been replaced and was the same key that he had always used to operate the vehicle. The contact stated that the failure was intermittent. The vehicle was taken to the dealer (contemporary motor cars Inc., 100 oceanport ave, little silver, NJ) where it was diagnosed that the electronic ignition was defective and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was approximately 130,000.

- Tinton Falls, NJ, USA

problem #7

Apr 032017

ML350

  • miles

A D V E R T I S E M E N T S

Takata recall, brake light harness

- Macomb Twp, MI, USA

problem #6

Feb 282016

ML350

  • miles
Since I got my car ml 350 2009 have to many problems like changing tires every 3 mounths plus alignment never done correctly, I have contacted from somehow to change my airbags and after I completed all information but they never got back to me. Plus I have series elctrical issue with the window, backup camera, door panels and cross control is not working at all when I use it for a long trip or drive on the highway specials when is there fogg at the street. And the light I changed it to many time but still never got strong enough to see in the front of me while I am driving. I wished I never have Mercedes and I will never do it again.

- Spring, TX, USA

problem #5

Dec 212016

ML350

  • 31,000 miles
The contact owned a 2009 Mercedes-Benz ML350. While driving, a burning rubber odor and smoke were present under the front passenger seat. The driver exited the vehicle and, within moments, flames completely engulfed the vehicle. The fire department extinguished the fire. A police report was filed and there were no injuries. The vehicle was destroyed. The cause of the failure was not determined. The manufacturer was notified of the failure. The VIN was not available. The failure mileage was 31,000.

- Halworth, NJ, USA

problem #4

Jun 112016

ML350

  • 80,000 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.

- Oakland, CA, USA

problem #3

Feb 022015

ML350 6-cyl

  • 54,000 miles

A D V E R T I S E M E N T S

Instrument cluster has an orange leak inside, dealer said that they never saw somehing like it before. Need to be replaced, the charge is about $2000.

- Los Angeles, CA, USA

problem #2

Aug 092013

ML350 6-cyl

  • 45,000 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. Also twice in the past year I called the dealer to say that I thought that there was some problem with the car because the air conditioner would randomly stop cooling. When I took it in they could never find the problem - it was intermittent. Since the fire Mercedes customer service has been terrible. I asked them to replace my lost belongings not covered by insurance (this wasn't much) and it appears that all they wanted to do was get rid of me and sweep this issue under the rug. Customer service Mercedes offered to give me $4,000 off the best deal that I could negotiate off a new Mercedes at my local Mercedes dealership if I was too buy a new one - they several times gave extended me this offer - when I went to the dealership and got a price, customer service Mercedes took back their offer. When I asked to speak to a supervisor the attendant hung up on me. The dealership was good to deal with - customer service was terrible terrible! I've called three times since and they will not put a supervisor on the phone. There is a problem with this car - it should definitely be looked into so that it doesn't happen to others. I'm very grateful that the fire didn't start while the car was parked in my garage or it could have been a catastrophe. I have pictures if anyone cares to see proof of what I'm saying.

- Fort Washington, PA, USA

problem #1

Nov 012012

ML350 6-cyl

  • 95,000 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. I can only open the hatch manually by crawling inside the vehicle and tripping a switch at the back of the vehicle. I am checking on how much it will cost to have the latch and actuator replaced. Estimates appear to be about $1,000 to have these parts replaced. After researching this issue on the internet there are many people who are having the same problem. On one site Mercedes even admitted that they are aware that there is a problem with latch on this model.

- Tulsa, OK, USA

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