Battery died (left lights on) car wouldn't start, obviously.
Connected jump leads, all lights fired up but still wouldn't start...no starter motor sound.
Tried to "tow-start" when aa man arrived..engine wouldn't fire
He thinks that because I connected the jump leads whilst the keys were in the ignition I've probably tripped the immobiliser.
What do you think? If it is immobiliser can I reset myself or is it a BMW only job?