Bought new 2007 X5 sight unseen. Ordered in October, picked up car in January. In gently rolling area the X5 3.0 seems underpowered. The transmission is constantly shifting and feels like it is straining. If you really put your foot on the gas, it's not as noticeable. Love the design, in fact am trading in for the X5 4.8. It's going to cost, but my mistake.