Fiddled with everything in the cockpit to see if everything works. That included the shift-on-the-fly 4x4 system.
Needless to say, the seller was happy to get back to the used car lot.

Afterwhich, we left the vehicle idling and the a/c on full to check for overheating and if the a/c turns warm during idling.
***Initial vehicle inspection included a quick visual check then zooming in on details like body panels, tires, glass, trim, etc. Checking for crash damage and any signs of faulty repairs. Engine visual check, see all fluids, check for leaks (look at the floor, too). Go under vehicle, check for leaks, off-road damage, anything that looks out of the ordinary.