The invention relates to a vehicle unit in a vehicle, including at least one multimedia control unit and at least one safety control unit for controlling multimedia and safety functions, wherein the vehicle unit is provided as a switching unit between the multimedia control unit and the safety control unit, and wherein the switching unit processes the data received from the multimedia control unit and makes the data available to the safety control unit. The switching unit also transmits data received from the safety control unit to the multimedia control unit. Furthermore, the switching unit has a safety level which is higher than that of the multimedia control unit and lower than that the safety control unit.