A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. The inventive driving device is provided with a second coupling which is embodied as a clutch and can be connected to the drive train parallel to the viscous coupling, resulting in increased redundancy and two-step rev control. The mirror reflective element is supported at a side of a mirror back plate and an opposing side of the mirror back plate is adapted for attaching the mirror back plate to a mirror actuator. The method includes decoding the data stream which was encoded using a logic circuit which had, as inputs, the data being sent and two address parity bits derived from the system address of the data.