Method for controlling the level of an air-suspended motor vehicle

A method for controlling the level of an air-suspended motor vehicle having an air-suspended front axle and at least one air-suspended rear axle, wherein level control valves designed as switching valves are configured to supply a plurality of air spring bellows with air whenever a lower tolerance limit of a tolerance band is undershot and to relieve the plurality of air spring bellows of air whenever an upper tolerance limit of the tolerance band is exceeded in order to adjust the actual level of the air spring bellows to a predetermined setpoint level, wherein the air spring bellows are arranged between running gear elements of the vehicle axles and the vehicle body, and wherein, when a particular operational state is present, at least one of the upper tolerance limit and the lower tolerance limits is modified in a suitable manner for at least one air spring bellows of at least one vehicle axle or of at least one vehicle side, the method comprising:

• determining, by a sensor system, at least one of the speed of travel or the actuation state of a parking brake;
• measuring, if at least one of the speed of travel has undershot a minimum speed of travel or the parking brake has been actuated, the actual level in the region of each air spring bellows;
• comparing the measured values for the actual level with the predetermined setpoint level;
• determining an actual level value of an air spring bellows having the greatest deviation from the setpoint level;
• and
• expanding, for the air spring bellows having an actual level having the greatest deviation from the setpoint level, the tolerance band to a corrected tolerance band by at least one of increasing the upper tolerance limit thereof to a corrected upper tolerance limit or lowering the lower tolerance limit thereof to a corrected lower tolerance limit.