rearwardly from the position of normal use fig6 the bolt 74 may run into a groove 76 of turning lever 50 behind hook 73 when bolt 74 is caught within groove 76 the mirror housing assumes a rearward tilting end position fig7 the drive motor 20 is hermatically sealed within a housing 45 within which additionally a reduction gear and a clutch may be provided the clutch may operatively separate the driving shaft of the driving motor 20 from the transmission member 60 if the mirror housing 2 undergoes an impact which is stronger than a predetermine threshold value such a clutch is disclosed i e in the published european patent application 169 245 for the purpose of the present invention providing such a clutch however is not necessary a shaft 46 extending from housing 45 is unrotatably connected to a cam 47 the free end of which is linked to a free end of transmission member 60 opposite to the end 51 an imaginary line through the center of shaft 46 to the link 61 of cam 47 to transmission member 60 runs away from the mirror housing in the position of normal use thereof according to fig2 thus the transmission member 60.