Hydraulic height adjustment device of a motor vehicle and motor vehicle

A hydraulic height adjustment device of a motor vehicle having at least one hydraulic pump arrangement which is connected via a feed branch to at least two actuators for adjusting a vehicle level of the motor vehicle, by a hydraulic fluid being able to be pumped by means of the pump arrangement from at least one tank arrangement into at least one of the at least two actuators, wherein in each case at least one switching valve is connected upstream of the actuators in order to permit or to prevent an inflow or outflow of hydraulic fluid, wherein the at least two actuators are connected via a return branch to the at least one tank arrangement, wherein a pilot pressure-controlled return valve, which is configured such that it holds the return branch open below a defined switching pilot pressure, is provided, wherein the return valve holds the return branch closed at or above the switching pilot pressure, wherein a pilot pressure line, via which a pilot pressure can be supplied, is provided between the pump arrangement and the return valve.