One problem related to fuel pump has been reported for the 2007 Mercedes Benz E350. The most recently reported issues are listed below.
Nhtsa action# pe12001 strong fuel/gasoline odor smell coming from the drivers side rear wheel area. Fuel tank is filled to full (after it "clicks" off) and this is when the odor is most prevalent. The E350 is parked in a single, detached house's 2-car garage. Fuel/gasoline smell is particularly strong in the enclosed 2-car garage. I am afraid the these vapors will ignite when in an enclosed space with the furnace in the sharing the same space (being that it is winter time now and the furnace is now kicking on to heat my house).