X5 M Sport buyers know exactly what they want, and the xDrive35d has long been the version enthusiasts quietly consider the pick of the range. BMW's 3.0-litre TwinPower Turbo inline-six diesel delivers 265 HP and a substantial 620 Nm of torque, enough to cover the 0 to 100 km/h sprint in 6.5 seconds while returning a remarkably efficient 16.7 km/L, which for a vehicle of this size and capability is genuinely impressive. Power reaches all four wheels through an 8-speed Steptronic automatic and BMW's All-Wheel Drive system, with Adaptive Air Suspension handling body control across varying road surfaces and providing the kind of ride quality that makes long distances feel effortless. Inside, the cabin is trimmed in Vernasca leather and equipped with BMW's Live Cockpit Professional display, iDrive 7.0, a Heads-Up Display, and BMW Gesture Control, all of which combine to make the driving environment feel properly considered rather than simply loaded with features. The Harman Kardon surround sound system, Panoramic Sunroof, and 360-degree View Camera round out a specification that leaves very little to add, while Driving Assistant Plus brings together Adaptive Cruise Control, Lane Keep Assist, and Pre-Collision Assist for genuinely relaxed motorway work. Showing just 15,000 km from new in Japanese domestic market specification, this is a well-preserved, thoroughly equipped X5 that makes a compelling case for itself on every front.