A control unit is configured to be mounted in a center portion of a vehicle roof in a passenger compartment of a vehicle. The center portion of the vehicle roof is defined as a surface area of the vehicle roof that extends in a main driving direction from a backrest of a front seat in the passenger compartment to a backrest of a back seat; and is arranged in a transverse direction centered between a first lateral edge of the vehicle roof and an opposite second lateral edge of the vehicle roof, the transverse direction being perpendicular to the main driving direction. The control unit is configured to sense at least one condition in the passenger compartment; provide at least one user interaction function; and communicate with a further control unit in the vehicle.