To answer the question, no. More power/better mileage = bonus, not requirement.
I'm excited about the possibility of getting the newest tech. One thing we seem to know for sure (and I think it's a bad omen) is no Auto Stop/Start, correct? I'd be surprised if the put the new engine but not ASS in the 2013 550s.
Last edited by christianfahey; 08-10-2012 at 10:25 PM.