The Mercedes Benz R-Class is a vehicle that is part-SUV, part-crossover, part-minivan, and is considered by many reviewers to be a luxury mid-sized SUV. Introduced in 2006, the R-Class shares a platform with the Mercedes Benz M-Class. Its primary competitors are the Lexus RX and Cadillac SRX. The R-Class is unique in its class. It features a tremendous amount of interior space, and it's one of the few vehicles with a third row that allows the vehicle to accommodate up to seven adults in posh comfort. With a wheelbase of 126.6 inches, the 2010 R-Class is also one of the longest vehicles in its class. MSRP starts at about $49,000.