Mercedes-Benz USA is offering 750 Signature Edition R-Class models for sale to help out Saks Fifth Avenue's Key to the Cure women's cancer research fundraising initiative. Now there's a much better brand-positioning strategy than using Tony Hawk as a spokesman. Skaters don't buy R-Classes; Saks-shopping women do (or most likely will when the crossover-wagon-suburban-luxo-car/van-utility vehicle drops in September). Which reminds us, we've gotta get to Saks, as we're running low on Prada lip balm. Seriously, that stuff does wonders.