A method and apparatus for moving a multipart sliding roof for a motor vehicle has a first angularly movable roof section, and at least a second and third roof section movable in the longitudinal direction of the vehicle for the positioned closing and opening-up of a roof opening. The cooling mechanism includes a hollow cooling jacket having an inner and outer coaxial surface, where the inner surface defines a generally cylindric cavity for receiving a stator in heat transference contact with the inner surface, and the outer surface has a cast spiral groove section with jogged cooling passages. The inclination detector 1 is connected to a counter circuit via an input circuit, and the input circuit and the counter circuit are connected to an MPU via an input-and-output port.