Motor vehicle air conditioning

The system has a shaft (14) rotated around a rotation axis (13) and designed as a kinematic element (16) with a partially formed transmission ring (15), where the ring transmits torques to a flank (18) of the ring on another kinematic element. An adjusting body i.e. air guiding device, is connected with an actuator i.e. electric motor, by the kinematics elements. A fictitious plane (20) lies at an axial end (19) of the flank and is aligned in angle (alpha) between 0 degree and 90 degree to the rotation axis. The ring is designed as a ring segment (21), and a housing is made of plastic.