Warning, Vag Group Cars - FYI

WARNING On all VAG group cars, VW,Audi, Porsche and in Europe SEAT and Skoda. Under NO circumstances disconnect anything with the ignition switched on. I know it's been mentioned before but I always thought it a bit of an urban myth though I knew about not disconnecting the passenger seat airbag key switch. In this case it was "only" the passenger airbag on-off warning light on the radio trim surround, I thought it was nothing...WRONG. As a rule apply this to EVERY CAR after 2008. I was a lucky, a friend has the diagnostic equipment but I still had to make a return trip in the evening to clear it.