Grab some H&R spacers and you'll be golden.

IIRC the E55 has a fairly shallow offset in the rear, +35mm I believe.

With the lowering springs and 9.5" wide rears, you'll want to push that out with at least a 10mm spacer... 15 would be aggressive but would be a NICE look, as you should be just flush with the fender.

Besides, you can't beat that price!

Nice score on those...