Motor vehicle with at least one rear axle with steerable rear wheels

The vehicle has as hydro-pneumatic suspension system with a supply pipe system, which is connected to the steering supply system (35) via an emergency connection pipe (36). This contains an emergency valve (37) operated by a valve control unit (38). The unit is arranged, so that with failure of the steering hydraulics supply unit (32), spring supply valves (20), emergency valve, and rear wheel steering valves (31), are operated, so that the rear wheel steering drive (26) is connected to the hydraulic springs (6,7) until the rear wheel are aligned for straight-ahead travel.