Lads,
A littly bit of info for you regarding the airbags.
I have disconnected the passenger airbag on my 1998 A4 due to not being able to use a baby seat in the front. As I do not have the SE model there is no disable switch in the glove box. The airbag warning light is on all the time, which i would expect. The dealers do sell a special plug that you connect into the airbag wiring harness, the plug has a resister across the 2 pins that fool the ECU into believing that the airbag is ok. They tried to charge me over £30 for it, hence I just unplugged the airbag and will plug it back in again after my little one moves to the back seat. To get access to the plug you need to remove the glove box. The other way the airbag can be disabled is to do it through the Diag port. The only problem with this is if your battery is on its last legs and the voltage drops below approx. 9 Volts, this can happen when cranking the engine, especially diesels, then the airbag can be reactivated without you knowing. Not good in an accident with a child seat in the front. This information came from an Audi engineer.
Hope it helps.....
Jim.