Hi, i've got a 2001 A3 1.9TDI. I was having problems with the windscreen having condensation and fog covering it whenever I got in, I found that this was because rain was getting into the car through the pollen filter, due to the scuttle panel not sitting correctly. The water would build up and run into the passenger footwell. I left this for a while as I could not get the windscreen wipers off. The other day I got in the car and the 'Passenger Air Bag' Light was going like a strobe, so I deactivated the airbag with the key. When I then started the car I found that the interior lights would not turn off, I could not lock the door with the button on the drivers door and the hazards would go off whenever they wanted. (I don't know if it was alarm related due to the alarm buzzer being broken) So I got the tools and took the wipers off, cleaned the pollen filter, soaked up the water that had been building up in the reservoir by the heater blower fan. I cleaned out all of the scuttle panel, but it still wouldn't stay down correct, so i've created a cover for the pollen filter. Then I took the heater blower motor off to check it, was fine. The Heater blower resistor was rusty as hell though, but still works, so that's fine I guess.. The car would then turn the interior lights off, let me lock the door and not randomly flash the hazards. But the 'Passenger Air Bag' light was still going like a strobe. That was all fine until today, I drove it with just the 'Passenger Air bag' light going, parked, and when I can back the interior light wouldn't go off, doors wouldn't lock and the hazards were going off again. Though the windscreen was not all condensed.So, thanks for reading all that, does anyone have any idea what has broken? To me it seems like the car thinks it's been involved in a crash, 100% hasn't though.