I have a friend who recently purchased a 2003 SL55 and he has had problems with a percolating/vibrating sound coming from the fuel tank from the first day. It's almost like a persistent rattling/bubbling sound that you can hear quite well from the rear while sitting inside the car. Mercedes has been unable to fix the problem.
Has anyone else experienced this problem with the fuel tank? Any suggestions on some articles which talk about this problem? Thanks for the help!
SL55 Fuel Tank Noise 
Linear Mode
