Other Fuel System Hoses Lines/piping, And Fittings problems of the 2006 Mercedes Benz E500

2006 Mercedes Benz E500 - I noticed a strong smell of gas. Outside of the car you could smell gas coming from the rear end under the wheel well. Inside of the car it was coming from the back passenger seat area. I called Mercedes Benz corporate office which then directed my call to customer care. They said they would refer me to a authorized mb dealer, and their were no recalls on my vehicle at the present time. The dealer they referred me to was walter's Mercedes Benz in riverside CA. I took it in and, I received a call the next morning stating it was my fuel filter & sensor. They also found a small oil leak. Fyi I have never seen any oil leakage from my car. Then went on to tell me that the repair was not covered by any recalls and it would cost me $790 for the fuel filter replacement and $1300 for the oil seal replacement. I went online and found a voluntary emissions recall campaign #2008-020001. I mentioned this to the dealer and their response was my vehicle was not one of the 8,000 vehicles effected by this recall, even though its exactly what is wrong with my car. I proceeded to look online where I found several other complaints mention a warranty extension for the fuel tank. I called mb customer care and asked them for a copy of the extended warranty. They emailed one. In this letter it states as one of the parts covered is the fuel filter/sender. I mentioned that to walter's Mercedes Benz and they said that the extended warranty does not cover my repair. It's very evident that Mercedes Benz as well as the dealerships are not honoring these so called voluntary and extended warranties. I refused to have the repair done and now my car sits in my garage. After bringing it back from the dealer there is now oil leakage! I never had any oil leaking until I took it to walter's Mercedes Benz dealership.