I have the same problem and have VAG COM diagnostic tool. (have already tried plug leads, dizzy etc, and swapped coil with another that I know works)
The VAG COM arrived last week and reads fault code - Immobiliser Implausible signal...??
Had the immobiliser checked by a specialist, nothing wrong with it. He did say however that often there can be a problem with the chip in the ignition key that in turn deactivates the immobiliser
So, took the fascia off around the ignition barrel and there is a plastic collar with a thick black wire leading off it into the loom. It looks like some sort of device that would read from the key when placed in the barrel....
Have read before that people have renewed ignition switches on this forum before and the problem has been solved.. can anyone else help on this.?
Cheers
