Well, I doubt the guys at Mequiar's ever say "gee, our stuff doesn't work well on this BMW, better go buy some Menzerna" :chuckle:
But seriously, I'm pretty confident you'll do fine with the M105/M205. The M105 has worked well on mine for the aggressive work, and whenever I get back to working on it (long-term project) I'll probably use M205 for the finishing polish.