Hello dear community, while browsing on eBay I came across various parts such as ECUs for the track change assistant. I’ve searched a lot on the net and here in the forum, but I hardly found any retrofitting HowTos. What did you retrofit? Did you find your instructions? I’d like to retrofit ACC, Keyless and the track assistant if possible. At the ACC (which seems to be also used from the kit in the Audi) someone has retrofitted with an Audi. I’m happy about your answers.