Four problems related to other fuel system tank mounting have been reported for the 2006 Mercedes Benz E350. The most recently reported issues are listed below.
I filled the tank before going on vacation. Car was left parked on my driveway. When I came back there was a strong smell of gas inside the car. The gas tank is under the back seat. Took vehicle to the dealer to fix. They replaced the tank inner module, cable harness, auxiliary pump, seal ring and breather pipe. Sending unit was leaking large amounts of fuel. Removed and replaced left and right side sending units. Modules in fuel tank and seals for the same. The problem was not fixed. I have to keep the fuel tank at less than 3/4 tank for it not to smell. Very concerned safety wise. For the amount of money I spent they could have replaced the entire fuel tank unit.
After returning home from the filling station and parking my E350 mercedes in the garage, I noticed a strong fuel smell outside the driver's side rear of the vehicle, and to a lesser extent inside the car. I was certain I had not somehow "over-filled" it, and after repeated fuelings since then, I know that is not the case. This problem is occurring when the tank is above 3/4-full. It progressively lessens as the amount of fuel in the tank is reduced. I took the car to the mercedes dealer (where I bought it new) and they advised that the fuel-sending unit is leaking. They wanted $659 for the repair which I declined as I wanted to first do some research and possibly get another quote since the price was absurd. I was then astounded to learn that this is a very common problem on these expensive vehicles, with numerous complaints documented within various automotive forums and filings with the NHTSA. It is wrong that a fundamental part like this should leak fuel. This is not a part that should require any service and in most circumstances should be expected to last the life of the vehicle. There are millions of other vehicles out there without such problems. So, clearly mercedes did not get it right on their design. I am now concerned about parking the car in my garage since it presents a safety hazard due to the fumes. I expect this problem will only get worse. Mercedes needs to step-up and retrofit these vehicles now instead of leaving it up to the consumer to absorb the cost of their manufacturing mistake.
I purchased my mercedes E350 in November of 2008. I began noticing a strong fuel odor every time I would fill the tank, which would dissipate after a few days. Since the odor would go away within a few days, I didn't realize that it was a safety concern. I took the car into the mercedes dealership for oil changes and such and they would always mention a long list of items requiring preventative maintenance, but never mentioned anything about the fuel tank (although the gas smell was obvious at times). In June of 2012, my husband began driving the mercedes to work. He smelled the odor immediately upon filling causing him massive headaches. Also, he noticed gas leaking under the car on the driver's side near the rear tire whenever he filled up the tank. A mechanic investigated the problem, and discovered a puddle of gasoline upon removing the rear seat. I could not believe the amount of gasoline that had pooled inside the cabin of the car. It was decided that the sending units needed to be replaced. Mercedes replaced the sending units, and knowingly sent us on our way without correcting the problem. Replacing the sending units did not resolve the issue. Heavy leakage continued, and the odor of gas became overwhelming as the temperatures remained in the 100's. When the car was returned to mercedes, they informed us of a leak in the gas tank and quoted us $2600+ for repairs. The mercedes service technician stated that our problem was not uncommon, especially with the arizona heat. I had been driving the car unknowingly for approximately four years with the fuel tank issue becoming increasingly worse and consequently, my husband and I have been unable to conceive a child.
Tl-the contact owns a 2006 Mercedes Benz E350. The contact stated that only when refueling to full capacity, a strong odor of fuel emitted inside of the vehicle. There was a small amount of fuel found on the ground next to the vehicle on various occasions. The vehicle was taken to an independent mechanic, who stated that there was a leak in the fuel tank and the filler neck valve. The vehicle was not repaired. The manufacturer was notified of the problem. The approximate failure mileage was 60,000. Kmj.