Question: Audi s7 2013 bcm2 all keys lost, Autel IM508 got the cs code, generated dealer key, programmed proximity, key was written in the system, remote and prox works, the car won’t turn on! Is it the key? Did it happen to anyone?
Solution: Missing sync data. Can be obtained from key supplied by dealer or 3rd party about 350-450$. If order dealer key or get sync data, it will work.