Ok... so time is pushing on and I've moved from my Audi A3 2.0 TDi (170 PS) to my now Audi A4 2.0 TDI (140 PS) SE Avant and so far I like it. Sounds like a step down? I hope not in the eyes of others. Has done 70k miles and is in very good conditon. Just need a little help or a link about VIN codes for these types of model and exactly what chassis I have. Can anyone please direct me? Thinking of what retro fits are available / worth doing. Thanks.