I was wondering if anyone could offer me a little advice about my A4. It's just clocked 100k and had a nice big service and new tyres and I'm interested in getting it remapped but can't really find much info about what gains I'd get out of it. Apparently it has already been mapped (badly) by a previous owner and so I'd want that taking off and a new, possibly custom, one put on. I don't really want to make any major changes to the car so I'm unsure about the whole de-cat thing and I'm not exactly mechanically minded. I've heard lots of good things about R-Tech in Leicester for mapping so thought I'd take it there but wanted some sensible info first. Without wanting to push it too hard, I want to feel a difference in how she drives. I do 100 miles a day on the M5 and would like to think she has a lot more power to give while improving my fuel economy (~43mpg cruising at 80mph) if poosible. Am I asking too much?