fuel leak
 

i have just bought a 2003 3.0i x5 and have discovered that there is a fuel leak.Next to the fuel pump under the back seat in the recess petrol is pooling here.I have used the site to try and research and been to several local mechanics and the dealer parts department.
I was wondering if anyone could tell me where or how to find out where the pipes go from the fuel pump,there is one pipe connected which must go to the high pressure pump,and i have another outlet which the pipe is missing from where the petrol is coming up out of.