REST button, function - GF83.40-P-2109-01A

Function 

The residual engine heat utilization function can be switched on by pressing the residual engine heat utilization button ( ) on the pushbutton control module. The system then operates automatically in the following states:

• Passenger compartment temperature depending on setting on temperature dials and display
• Blower low speed
• Flap position permanently programmed
• Battery voltage > 11.8 V
• Time limitation 30 minutes or ignition ON