2007 Mercedes Benz CLS550 fuel system problems

Filed Oct 15, 2025 · Fuel system · OK

The fuel tank has a leak from a defect in the plastic, and my local Mercedes dealership is unwilling to honor the Warranty Coverage Extension that covered fuel tank components to replace the fuel tank.

Filed Sep 19, 2017 · Fuel system · 86,000 miles · FL

I am referencing action # pe12001. After each of my last two fuel filllings, the car is emitting a very strong smell of gasoline from the back seat & trunk compartment. I park my car in my garage and the smell is strong enough that I can smell it in my home. I am extremely fearful that there will be a fire. I do not desire to park my car outside, but I believe the car is unsafe to keep in garage. I have lost confidence in my car fearing that even driving it around town could pose a danger to me and my passengers.

Filed May 17, 2017 · Fuel system · 43,733 miles · LA

Note that the vehicle on has 43,733 miles - cabin interior strong live fuel fumes - constant gas fumes on the inside of the car cabin. Note that the car was stationary at my residence parking. I did not know where were the fumes coming from at the time. Got a headache just for the moment I was trying to determined where were the fumes coming from. This is currently for all drivers and owners a very hazardous dangerous condition to all extremes, very high risk from ignition from static or electrical, due to wire hardness in the area. Vehicle was towed and took it to mercedes benz dealer and found the following: leakage in fuel system. Replaced fuel tank fuel tank drain/fill observed accident prevention regulation "12 wl08" fuel tank and fuel for storagebring observe accident prevention regulation "12 wl08" performed by mercedes-benz of new orleans. Fuel tank leaking in the interior was found / was drained & refilled and fuel tank replaced. This was cover under a new settlement with mercedes benz and the federal safety agency. I think that this should have been a recall when it relates to safety factors.

Filed Jan 26, 2017 · Fuel system · 87,726 miles · CA

My husband and I purchased the 2007 cls550 about september 2015. We noticed when filling the vehicle with gas, we would have gas fumes in the vehicle specifically on the passenger side rear inside and outside. The fumes were light and would dissipate once the vehicle was driven to reduce the amount of gas in the tank to about three-quarters tank. Last week we filled the tank and the small is now stronger and has yet to dissipate although we have a quarter tank of gas remaining. I checked for any recalls on this since we have no knowledge of the vehicle having been in any accidents, but find we do not. This online search did not reveal any recalls for the gas fumes, but I noted there are multiple complaints about the same problem for this year, make and model of vehicle. Have any people died from this, any fires, accidents as a result? We have not yet, but will be taking our vehicle in for evaluation of the problem and would be able to provide documentation of the results in the future. Given the name, I am surprised mercedes is not stepping up here!

Filed Jan 10, 2017 · Fuel system · 200,000 miles · CA

Tl* the contact owns a 2007 mercedes-benz cls550. When the contact entered the vehicle, a fuel odor was noticed without warning. The failure recurred. The vehicle was taken to an independent mechanic who diagnosed that the fuel tank was cracked and leaked fuel. The manufacturer was made aware of the failure and stated that there was no recall. The manufacturer stated that the vehicle would be repaired for free if the contact took the vehicle to a mercedes dealer. The vehicle was not repaired. The failure mileage was approximately 200,000. The VIN was not provided.

Filed May 3, 2016 · Fuel system · 58,700 miles · CA

I owned 2007 mercede cls550. I notes a strong gas smell inside and out side the car after I fill it up. I replaced the fuel cap but no help. Fumes fill up my car and my garage every time I fill up now.

Filed Mar 24, 2016 · Engine, Fuel system · AR

Every time I fill up my tank with gasoline, once I park in the garage, the garage is filled with strong gas fumes from my car. I checked for leaks under the car and found nothing. I have to raise the garage door to let the fumes out, due to getting lightheaded from the fumes. The fumes remain with the car for 7-10 days. This has been going on for the past four years. This problem is a danger to my family's health!!!! Surely, there is a recall on this problem! 2nd issue: I turned my car off and the fan kept running. I noticed that the fan was so loud that it sounded like it was about to blow up. Black smoke came from under the hood. I went on into the building to my meeting for an hour. When I came back outside, the fan was still going and still loud. This had never happened in the five years that I had the car. The car would not start. I had to call someone to boost it off to start. I then went to the shop to check to see if I had battery or starter problems. No problems found in either. This has happened twice since then. I am afraid that the car will catch fire with me in it or my family or friends. 3rd issue I was driving along and the dashboard read out in red to stop the car ..vehicle is too low... When stopped, I noticed that the passenger side of the car was low and the driver side is raised high. I have to sit there for a few minutes until the red lights went out. This happens often. 4th tire pressure light stays on. I took it to check on pressure, it was ok. I did not need new tires either. The yellow light stays on and this week the red light popped on and will not go off. 5th the check engine light stays on and mechanic can not find the problem. 6th steering system loud popping noise when I back up or turn steering wheel. It used to be random but now it is every time I drive the car.

Filed Oct 16, 2015 · Fuel system · TX

Tl* the contact owns a 2007 mercedes benz cls550. After refueling the vehicle, there was a strong odor of fuel present inside the cabin of the vehicle. In addition, the vehicle failed to start on several occasions. The contact noticed that there was fuel leaking from under the driver side of the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed that the left fuel level sensor failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown.

Filed Jul 28, 2015 · Fuel system · 51,000 miles · NC

Tl* the contact owns a 2007 mercedes benz cls550. The contact stated that strong fuel fumes were present inside the vehicle. The vehicle was taken to an independent mechanic, but a leak could not be detected. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 51,000.

Filed Jul 9, 2015 · Fuel system · 105,000 miles · TX

There is a fuel leaking into the backseat of my 2007 mercedes benz cls 550 I began noticing the smell in my car a few months ago and I finally decided to remove the back seat, under the back seat lies the fuel tank and a fuel filter module which is leaking and creating a small pool of fuel and a fuel scent in my car. Incidentally mercedes had a recall on the mercedes benz 2006 cls (voluntary emissions recall campaign #2008-020001) my car is a mercedes benz 2007 cls with the exact same problem. I would like to file this complaint and ask that you help me in getting mercedes benz to take responsibility for this faulty fuel filter module and initiate a recall to repair this problem. This problem has been documented extensively on many mercedes benz forums http://www.mbca.org/forum/gas-leak-sending-unit this issue creates an immediate hazard to me, my family and other drivers. I ask that you take quick action in contacting mercedes benz demanding they make amends to this issue before someone gets seriously injured.