9. Mercedes G63 AMG 6×6
The Mercedes G-Class is one of the longest-running models in the car world. First introduced in 1979 as a primarily military off-road SUV and truck, it is still on the market with the same basic design. It survived many modifications and redesigns during the course of almost 40 years but never changed its distinctive appearance and basic mechanical layout.

So, what do you do when you cannot modify the model anymore and can’t make it more exclusive? Simple, just attach a pickup truck bed and install one more axle and make it the fastest, most expensive, and rarest 6X6 in the world. Mercedes did exactly that creating one monster of a truck. Monster by power and torque ratings and monster by sticker price too. Under the hood is the 5.5-liter twin-turbo engine with 540 hp, which delivers power to all six wheels through a specially built automatic transmission unit.