Trust me you do not need an electrician, I am useless at this kind of thing but after doing it on Sunday (with the help of Chris and others) i reckon it's pretty straight forward.
If you have a TDI or 4 motion it's even easier!!
Marco,
How come you had the angle sensor replaced?? It just needs re-calabrating, then agin you did have it done under waranty so I suppose it doesnt matter.