The chassis has the same dual-sided nature. It integrates several adaptive systems. Air suspension is standard on all cars, which is self-levelling, and can lower itself for faster, sportier driving. It works with standard adaptive dampers.
Our test car added had two options: rear-wheel steering, and adaptive roll stabilisation. The roll stabilisation uses electromechanical actuators to twist the anti-roll bars and reduce cornering roll. The rear steering adds agility at low speed by going in the opposite direction to the fronts. At speed it goes the same way, for stability. The 7 had both these before, but they’re redesigned, and actuated electrically not hydraulically, which makes them quicker-witted and more efficient.
But the real cleverness is the control and integration. For instance, the processors read the upcoming road from the navigation, and set the car up for corners. If the road ahead is straight, it’ll relax the chassis. Of course it also tailors itself to the way you’re driving.
Never mind the digital wizardry, it feels amazingly natural. For a big barge it feels light-footed and amazingly natural. The steering is fairly light for gentle inputs but extremely progressive. At any speed, it’s easy to pour it into a corner in one liquid-smooth motion. Body movements are tidy and well-damped.