I've just got my hands on a nearly new Audi S4. It looks to be a really nice vehicle but is missing navigation. I am very dependent on my Sat Nav and feel somewhat reluctant to suction-cup a £99 TomTom job to the windscreen of a £30k car. Does anyone know what is involved in getting nav fitted? I noticed that the entire suite of knobs and buttons are relocated to the gear lever area so it doesn't look like a particularly easy fix. I have trawled the net and found retro fitting for quite a number of Audi models but seemingly not possible for the new A4?