Auxillary Tank problems of the 2006 Mercedes Benz E500

The contact owns a 2006 Mercedes Benz E500. The contact stated that after refueling, fuel fumes were emitted into the vehicle. Also, the contact mentioned the fuel tank could only be filled half way to avoid the fuel from leaking. The vehicle was taken to an independent mechanic. The technician diagnosed that the fuel tank needed to be replaced. The vehicle had not been repaired. The manufacturer was notified of the failure. The approximate failure mileage was 60,000.