I have a question about your wiring. I have a MKIV jetta I am wiring at the moment and I have something very annoying. There are wiring guides along both sides of the car just inside the door sill under the trim. But where the front seats attach to the floor there is a cross member reinforcement that connects right where the wires run. The stock wires run under it fine, but it's jsut about impossible to fit anything else under it. I may have to cram the wires under the door sill trim instead of in the wiring guide.
How did you wire yours?