The convenient heat and fresh air regulation without starting the engine. The auxiliary heater heats up the vehicle interior and clears ice from the windows without starting the engine. The auxiliary ventilation feeds in fresh air and lowers the interior temperature. A control of both functions occurs with the timer and the departure time programming. The heating and/or ventilation duration time and energy-efficiently are calculated. The separate radio remote control with illuminated display can also be used to control the system. Notes: Only usable in combination with automatic climate control and MMI radio plus, MMI navigation system or MMI navigation system plus The retrofitting of an auxiliary heater/ventilation is noted in the service booklet. An activation document is also included We recommend that installation is carried out by a specialist workshop Similar image.