my dub knowledge is faily limited... but the theory is all the same so here goes.
7x16's on a mk2 shouldnt be too much of a problem, it depends mainly on the offset of the wheels... if u could get it so that the outside edge of the wheel sits just inside the arch, then even with an extreme lowering job u shouldnt scrub.
IM(rather limited)O 7x16's on about a 35-38 offset with 195/40/16 tyres shouldnt cause you much worries.