Download 2003-Current Audi S4 (B6 & B7) Includes Sedan, Avant, & Cabriolet These instructions are applicable to vehicles equipped with either manual or automatic tiptronic transmissions. Step 1: Using a Phillips head (star) screwdriver remove the 2 screws holding the factory air inlet scoop. The location of these screws is marked with arrows right. Once these screws are out, the entire inlet scoop can be pulled out. It is made up of 2 pieces between the front of the car and airbox and may need to be split to get it out. Step 3: Using a flat head screwdriver, pry off the plastic clip that attaches the airbox to the passenger side inner fender. The photo right shows an up-close view of the clip. It is best to pry out its center section and then pry out its perimeter housing. Step 4: Disconnect the wire that leads to the MAF sensor by depressing its fixing clip and by pulling apart. Note that the fit will be snug however if too much force is necessary, then the fixing clip is not being depressed enough.