I've got a 66 plate A4 avant. Recently the air con is showing as off when the engine is on. When I try to change it to on or eco they are greyed out and I can't select them.
I can select eco or on when just the ignition is on but I'm not sure if it's actually working.
After a bit of googling it either needs as regas, a new pressure switch or an new compressor.
Anyone else had any similar problems??