A mobile communications device comprising a gateway is provided. The device enables an automated discovery of a vehicle environment is enabled. Hereby context information relating to the vehicle environment can be automatically communicated to the service backend. Also context information from the service backend can be provided to the vehicle environment all utilizing SIP Presence technologies. The invention can in accordance with one embodiment be implemented in an IMS system. In accordance with one embodiment a communications device comprising gateway can be provided in the form of a mobile communications device, such as a mobile telephone. The gateway can for example be an IMS gateway.