Hello, let’s ask you a question about some parts in the engine compartment of my Audi 80 B4 (Bj. 9/91) 2,0 (ABT). I am absolutely ignorant in the field, yet I would like to know at least about this “decision” 🙂 To make it easier, I have attached a picture and the parts are labeled on which it is concerned. In fact: To the left of the air filter there is a plastic part (1) from which an aluminium flexible hose (2) leads over (3) to the air filter. What are (1) and (3) and what are they for? And what else vie l more interesting for me: Is there an alternative to the Aluflex hose? I have changed it already twice within 13 months and 25TKM and as can be seen in the picture, it is already over again. Or doesn’t it need it at all? (Well, then he probably wouldn’t be there 🙂 ) Thanks already in advance for your help and answers!!!