Only vehicles with THERMOTRONIC automatic climate control have the residual heat function.
When the engine is switched off, it is possible to make use of the residual heat of the engine to heat or ventilate the front compartment of the vehicle for approximately 30 minutes. The heating or ventilation time depends on the set vehicle interior temperature.
rocker switch. When residual heat utilisation is switched on, the indicator lamp above the rocker switch will light up.
The blower will run at a low speed regardless of the airflow setting.
If the "Residual heat" function is switched on at high outside temperatures, only the stationary ventilation will be switched on. The blower will then run at medium speed.
rocker switch again. The indicator lamp above the rocker switch will go out.
after a running time of approximately 30 minutes
if the starter battery's charge status is too low
when the ignition is switched on
when the hot-water auxiliary heater is switched on