Hi guys, I'm looking for some help with this one. The customer has been on holiday for two weeks and on return the car would not start due to flat battery, we tried jump start and when the ignition is cycled the fuel pump is heard priming and the engine will start and run for a second then cut out and safe is displayed in the instrument cluster?

We tried both keys read fault codes and we have 17978 engine control unit blocked - permanent in the engine dtc's and B104A00 engine control module not identified - permanent in the immobiliser dtc's.

I have since fitted a new battery as it tested dud, tried holding the positive and negative terminals together for ten seconds to reset all memories but still no joy. I can recall having the Same thing with a golf about ten years ago and it was a simple immobiliser adaptation to fix it but not sure what channel it was or if this will be the same?

Any VAG experts out there? Thanks