BMW Repair: Wiring fault, bentley manuals, electric windows

Question
Hello.
I have an N reg BMW 318iEstate. The central locking, front electric windows and the sun roof have stopped working,have been told that the fault could be the comfort relay, do you agree and if not what do you diagnose?. Ocean BMW here in the U.K. say the relay is under the dashboard, have removed same, but can't find it. Where is it PLEASE, the search is driving me crazy,

Answer
I can't determine what it is as I am many miles from you.Checking for power at the switches ,fuses and any relays are your first step.Checking the grounds also is important.Getting a repair manual from Bentley Manuals will help your search for the relay