Purchased a 2007 A4 from a Benz dealer. I have 1 working switchblade key and 1 non-working SB key and 1 standard non-working key. The local Audi dealer said they could not be programmed because they had already been programmed to another vehicle. Both of the non-working keys open all doors and start the car and then it dies in 2 seconds. I talked to an Audi dealer 80 miles away and they said that was strange and ikeyless also said the same. Both AD and Ikeyless said the emobilizer would need to be reprogrammed and the new unworking keys could then be programmed.
Any ideas or help?

 

That sounds about right. I had to have a new key put on to the end of my fob in my Jetta that I use to own. The same thing kept happening. I could not leave the dealers garage. they had to take all of my keys and reprogram them because of the imobilizer. My 2000 Jetta GLX uses the same key system as our Audi's.