A motor-vehicle dashboard, air vent and relative positioning adapter body

A motor-vehicle dashboard, comprising:

• a shaped support body provided with at least one fixing seat for positioning and fixing a ventilation unit arranged for providing an airflow towards the motor-vehicle interior,
• wherein said ventilation unit comprises a support and flow-guide body, an air vent and adjustment means for adjusting the direction of the airflow,
• a positioning adapter body rigidly connected to the shaped support body at the fixing seat, and arranged to selectively receive said ventilation unit,
• wherein the positioning adapter body is a ring-shaped support flange comprising a main opening and a plurality of fastening and support elements for rigidly and coaxially connecting the positioning adapter body to the seat and the ventilation unit to the positioning adapter body, so that the support and flow-guide body protrudes inwards of the dashboard, through the main opening of the positioning adapter body,
• wherein the positioning adapter body comprises a main ring portion from which extend a plurality of extension portions provided with said fastening and support elements,
• wherein the positioning adapter body comprises respective grooves provided along the circumferential surface defining the main opening and arranged for centering the ventilation unit within the main opening,
• wherein the positioning adapter body comprises a plurality of centering holes along the extension portions, arranged to selectively receive respective centering elements of the support body,
• wherein the positioning adapter body comprises a plurality of fastening holes arranged to receive respective fastening elements of the support body.
• wherein the positioning adapter body defines an abutment and fixing surface for the air vent, so as to enable assembling of ventilation units of the same type on different dashboards defining different dimensions and installation spaces.