Beautiful car, really pops in that colour. I just picked up a 2004 111S with 37k miles. It's redefining my understanding of cornering speeds :-). Just need the dry spring/summer weather to arrive!
The reason they changed the grilles for mesh on later cars is because of updated safety regulations. They added something which says you should'nt be able to fit a hand in to the intake or engine bay etc (child safety nonsense blahblah). The louvre style grilles look better I think, probably better for cooling too.