This is the transfer case range and suspension selector of the 2017 Land Rover Discovery HSE Luxury Si6. In this year’s test we have two similar Land Rover Discoveries, and this is the gas-powered version with a 3.0L supercharged V-6. These knobs control the Discovery’s Electronic Air Suspension and the two-speed transfer case with active locking center differential. Both of these SUVs also have an active rear locking differential. While we could complain about these controls they are pretty intuitive to use, fit the vehicle, and while these Land Rovers look soft and cushy, they flat out work off-road. They work way better than they have a right to, and are arguably some of the most capable SUVs available today. That’s not fluff or lip service, Land Rover has the 4WD system on these rigs figured out.