A drive system for a utility vehicle has at least one rear axle, which can be permanently driven from a drive engine via a speed-change gearbox, and a front axle which is operatively connected to the rear axle by an axle engagement clutch that can generally be controlled manually for engagement and disengagement. The wattles entrap blowing or deposited sand within the interstices of the fibrous filler material to define an anchor member. A first input receives a first capacitance adjustment signal.