An air spring arrangement of the motor vehicle is equipped with a tire-fill device which includes the fill unit (20) and a tire-fill connection unit (4). A filling of a reserve tire is ensured even when there is an electric fault in the level control system. The tire-fill connection unit (4) includes an air supply connection (6), a proximity switch (8), an electric sensor connection (10) and a pneumatic connection (12) for rapid coupling and valve connection. The proximity switch (8) includes a reed contact (28) which includes three terminals (32a, 32b, 32c) which are connected to a control apparatus (34). A component (14) has a pneumatic valve connection (16) and a permanent magnet (18) and is connected to the pneumatic connection (12). The permanent magnet (18) excites the reed contact (28) to switch when the component (14) is connected to the tire-fill connection unit (4).