2012 Mercedes-Benz CLS550: fuel leak

Filed Oct 3, 2025 · Fuel system · FL

For several months I been smelling different odors from my 2012 CLS550, getting stronger as the weeks go by now smelling like gas, would noticed puddles whenever I parked from rear driver side area towards middle, just got the news from the mechanic that the driver side fuel gas pump is cracked and leaking gas and passenger side is also cracked. Labor + parts $1,660.00..

Filed Mar 19, 2025 · Fuel system · FL

I have Mercedes Benz CLS 550. Whenever I fill up a tank full, I smell gas in the CAR and in my garage. After researching the cause of this issue , I found its a common issue with Mercedes Benz older vehicles where the fuel sender unit cracks and start leaking Gas which is located under the rear seat driver side. Mercedes Benz sent a recall notice for same problem for older vehicles from 2006-2008 to fix this issue. Below are the steps to reproduce the issue 1. Fill the car up. 2. Drive straight home. 3. Park in the driveway. 4. Take rear seat out(pull up on the leading edge of the lower cushion...there are 2 tabs to depress then the seat comes up) 5. 8mm socket and take the drivers side inspection cover off. 6. There will be a fuel lake around that sender.

Filed Sep 22, 2020 · Fuel system · TX

Fuel leak into rear driver side back seat from below. Gas leaked into passenger cabin due to a seal that broke from gas tank. Dangerous smell and fire hazard. Leak happens all the time, when parked and especially when driving. Mbusa and dealerships not accepting the defect and design flaw that causes gas to sputter into passenger cabin when driving.

Filed Jul 6, 2019 · Fuel system · FL

Fuel leak from unknown part of the tank

Filed Sep 18, 2018 · Fuel system · 81,000 miles · FL

"fuel leaking from gas tank" after smelling a strong fuel smell both inside and out side my vehicle I took to mercedes 9/17/18 to see if they knew of the issue of if there was some type or recall on my vehicle regarding a fuel issue. The smell always seemed stronger after I put in a full tank of gas. They did a visual inspection and told me they see fuel leaking from my vehicle and that there was no fuel related recall. They wanted to charge me $185 just to see what the actual problem was and didn't really have a concern if the vehicle was safe to drive or not. So I took my car to a local auto shop to do an oil change and to look into the fuel issue. As I was in the waiting area while my vehicle was being looked at the shop owner came in and asked if he could save my life? I then followed him to the garage bay where he showed me a pool of gasoline sitting on top of the fuel tank underneath my driver side rear passenger seat. My gas tank had been leaking and collecting fuel on top of the tank. The over flow of the leak was pouring underneath my car and onto the hot exhaust. This has apparently been a know issue at mercedes but they have done nothing about it. Total disregard for safety or human life.