A mounting device for an indirect vision system of a vehicle includes a support arm attached to the vehicle, an imaging device such as a mirror glass and a carrier member onto which the imaging device is mounted. The carrier member includes thermoplastic melt-processable material that is molded around a fixing area of the support arm such that the thermoplastic material completely seals and circumferentially surrounds the fixing area of the support arm. Except in the fixing area, the cross section of the support arm is circular. For example, in the fixing area the support arm is oval or kidney shaped or has a groove into which the thermoplastic material enters as the material is molded around the fixing area. In the fixing area, the support arm has various gripping surfaces or protruding pins or bolts that improve the axial positional fixing of the carrier member to the support arm.