Hi, I have a 2.4 v6 30v A4 B5 i always thought this car was vrtually identical to the 2.8 apart from the fact that the 2.8's were 4WD and the 2.4s FWD after very recently fitting a supercharger i am having difficulty in completing the secondary air solenoid vaccum set up to the supercharger because my car does not have a secondary air solenoid, can anyone help are there any other 2.4 A4's on the forum ? my cars a 1998 A4 if there are would you mind having a look at the vac line set up on top of the thottle body on your car to see if any other 2.4's have a secondary air solenoid, or have any of you replaced the brittle vac lines? because not even my local Audi dealer can advise on this but this doesnt surprise me ! thanks