THERMOTRONIC overview
Sets the temperature 
Sets the airflow 
Vehicles with windscreen heaters: switches the windscreen heater on/off More
switches the stationary heater or booster heater on/off More
switches the rear window heater on/off More
Switches air-recirculation mode on/off More
Switches windscreen demisting on/off More
Sets the air distribution More
Switches the A/C function on/off More
Sets climate control to automatic mode, front 
Activates/deactivates synchronisation More
Vehicles with dual-zone climate control systems: adjusts the rear-compartment climate control/heating (indicator lamp flashes) MoreThe indicator lamps on the buttons signal that the function in question has been activated.