I suggest you take the car to a VW dealer, or a specialist to get this serious problem sorted, and not take just anybodies advice on a Forum!
In general, AB warning light faults can be linked to the plug under the front seats, that can have the connection disturbed by either different drivers adjusting the seat position, or objects being placed under the front seats to stow them out the way, and the plug gets knocked... this will only put the warning light on though, and will not deploy airbags or pre tensioners though
Thom