God damn it, everytime I chuck it in reverse its acting like there is someone standing behind... Its over-sensitive/obviously faulty but no fault codes registered... There are 4 of these little blighters... so its trial and error... couple of dumb questions: 1. Are they expensive? 2. Can you get them ready painted from Audi or some place? 3. Common fault? I only ever really use them to reverse as close as possible to the rear of the garage wall (small garage). Cheers.