Might be wrong but thought there is no switch in the door pillar of an Audi A3 The switch is built in to the door lock and you will probably need a new lock to sort this fault .
Found this re.fault
Its built into the door lock & only comes with the lock.
You need to get an Audi dealer to read the fault memory as it can be a number of different faults. Any one of the door locks, bonnet switch, boot lock switch or interior monitoring sensors if fitted.
Posted on Monday 23rd of August 2010Don't understand this? Ask a question