Originally Posted by LuckyEddie

Did you open the tank to relieve the pressure?? Open the cap and you will find that it has pressure in the tank(at least the three Mercedes I have keep pressure in the tanks). Until the pressure is gone it will spew fuel all over the place. (ask me how I know)
The bolt does not require much torque to seal the filter it is the O ring on it that will not seal and people tighten the ____ out of it in a effort to stop the leak. Get a new O ring every other filter change and it will be no trouble. Treat the filter like a oil filter - lube the rubber ring on the can and when it touches the housing then about 3/4 turn more.

Robert