46 Heating and air conditioning system ›  Climatronic automatic air conditioning system Fogging Overview of the controls for the manual air conditioning Automatic switch-off of the cooling system Climatronic automatic air conditioning system What you should be mindful of › Increase the blower speed, switch on the cooling system, and set the air distribution to the wind- screen. ▶ We recommend keeping the interior temperature no more than 5 ° C lower than the outdoor tem- perature. A Set the temperature B Set the blower speed C Set the direction of the air outlet If the coolant temperature is too high, the cooling system may switch off automatically. This ensures sufficient engine cooling. Switch recirculated air mode on/off Switch the cooling system on/off When the cooling system is switched on, the tem- perature and humidity in the vehicle will drop. Switching on the cooling system prevents the win- dows from misting up. Danger of misting! Risk of accident! In recirculation mode, there is no fresh air supply from the outside. This can result in loss of driver at- tention and fogging up of windows. After pressing the   button, the indicator light in the button illuminates, even if the conditions for switching on the cooling system are not met. The cooling system switches on when the conditions for switching on the cooling system are met. Automatic activation of the cooling system prevents the windows from misting up. The system switches on in the following cases. ▶ We recommend switching the cooling system off about 10 minutes before the end of the journey to prevent odour formation. ▶ Annual disinfection of the air conditioning is rec- ommended. ▶ Always keep the fan on. ▶ Keep the recirculation mode switched on for a short time only. WARNING WARNING Cooling system Automatic activation of the cooling system Operating conditions for the cooling system Recirculated air mode Operation The recirculation mode prevents contaminated out- side air getting into the interior of the vehicle. Briefly switching on recirculation mode can increase the cooling effect. ✓ Outside temperature above 2 ° C ✓ Running engine ✓ Fan switched on ▶ When the fan is on and the air distribution control- ler is in the   position. ▶ When the air distribution controller is not in the  position, and recirculated air mode is switched on. In this case, the recirculation mode is switched off. Under certain circumstances, the recirculation mode may be switched on or off automatically. When the air conditioner is operating, the engine idle speed may increase automatically. When the cooling system is switched on, water can drip off the air conditioning system. This is not a leak. Troubleshooting Water under the vehicle A Set the temperature B Climatronic display C Set the blower speed D Set the direction of the air outlet