With a complete overhaul just around the corner, the BMW 5 Series comes back unchanged. In the last several years, it has lost numerous versions (wagon, hatchback and M sports car). Only the sedan remains. Fortunately, the diesel is still available. There are four available trims, from the 528i to the powerful 550i, and all receive BMW's xDrive all-wheel drive. BMW’s 5 Series is a direct competitor of the Mercedes-Benz E-Class.