I'd say that AT LEAST 75% of people aren't going to have a clue whether it's the latest generation of 7 Series or S-Class or not, and even less are going to care.

As long as it's immaculate, you're laughing.

Certainly, some people will be picky and want the latest and greatest, but they'll go elsewhere. Likelihood is, you'll be more competitive on price and pick up customers that the competition won't, so it's swings and roundabouts really. That's the nature of virtually any business.