Hi All, I'm looking at changing the alternator on the wifes' 1999 2.5TDi B5 Avant Quattro with an AFB engine, and am struggling to find out what is the correct part. As far as I can tell, there are 4 types, 2 Bosch and 2 Lucas, 90 and 120 Amps. I'm assuming if I get a different amperage (I'd go for the higher one), as long as I use the the same manufacturer the part should fit, but what about if I get a Lucas instead of Bosch, or vice-versa? Unfortunately I have had a look underneath (after removing her panzer plate) and cannot see any label or plate on it. Does anybody have any way of telling what is what? (and does it matter??) I really don't want to have to remove it first, as time is limited and we need the car!