W220 Fuel (petrol) smell

[Newby]

My W220 S500 runs perfectly and returns normal mpg, but in the last few days I have done a couple of long runs and could smell petrol as soon as I got out of the car. It seems worse around the front passenger door, although I can see no sign of leaks or drips. Can anyone help, or tell me where the fuel pump, filter, breathers etc. or other suspect areas are? Thanks

 

[Newby]

I have now discovered the area of the leak. Under the car, there is a black plastic bowl shaped cover approx 1 foot diameter, directly below the rear nearside seat, and petrol is dripping (with engine running), from a hole in the centre of it. Before I get under the car, can someone tell me what's inside this cover, and how to get it off please. Thanks

 

[C220GJS]

Fuel pump and filter. There are 3 nuts which holds the cover in place. Undo the nuts and the cover will pull away to reveal the pump and filter.
See here ; http://www.detali.ru/cat/oem_mb2.as...633722.635&CT=F&cat=66H&SID=47&SGR=030&SGN=02 ;if it's only leaking with ignition on probably a broken or loose fuel filter hose clip.
Cheers, Geo.

 

[Newby]

C220GJS What a star! many thanks. Thanks for the link to the diagrams.. I'll have a look when I have the use of a 4 post lift on Tuesday, and post my findings. Thanks again.

 

[Newby]

The problem was a hairline crack in the end of the fuel filter. Replacement fitted (local motor factors £36) and job sorted.