Thank you so much Georg ! Yes ok, I have saw, but on schem 64_0522, it's impossible to see exactly where to place the parts ! And more than all, I must to find / buy the cable tree. I would like to find an used heather with this equipment, but I don't know where look for ! Have you ever do this kind of work on your e30's?It's very dammageable for the cost of this parts. In France it's more expensive ! At the yearsof e30's pduction, this equipments cost not more than 180€. Even in the US (ebay), where usualy it's easy to find some rare optional equipments (like cruise control), here impossible !Thanks a lot for this detailled information, it's very pleasant to find someone like you. I'll think about my project. See you later !Hugo