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  • V-Class
  • 06/2020
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Switching the residual heat utilisation on/off

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.

Switch off the engine or remove the key.
To switch on:
press the top or bottom section of the 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.

To switch off:
press the top or bottom section of the rocker switch again.

The indicator lamp above the rocker switch will go out.

Residual heat utilisation will switch off automatically in the following cases:
  • 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