If gearbox is on neutral you can spin the wheels separately. Though not very representative for testing brake drag as you are also rotating front propeller, transfer box and gearbox main axle.

__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey