Activating/deactivating the residual heat function

The residual heat function is only available in vehicles for Canada with automatic climate control.

It is possible to make use of the residual heat of the engine to continue heating the stationary vehicle for up to 30 minutes after the engine has been switched off. The heating time depends on the temperature that has been set.

speed The blower will run at a low speed regardless of the airflow setting.

heat function If you activate the residual heat function at high temperatures, only the ventilation will be activated. The blower runs at medium speed.

0 in the ignition lock or remove it. Turn the SmartKey to position 0 in the ignition lock or remove it.
button. To activate: press the The indicator lamp in the  button button.
The indicator lamp in the lights up. button lights up.
button. To switch off: press the The indicator lamp in the  button button.
The indicator lamp in the goes out. button goes out.

automatically: Residual heat is deactivated automatically:
• after about 30 minutes
• when the ignition is switched on
• if the battery voltage drops
• if the coolant temperature is too low

    See also:

    Resetting triggered NECK-PRO head restraints
    WARNING For safety reasons, have the NECK-PRO head restraints checked at an authorized Mercedes-Benz Center after a rear-end collision. WARNING When pushing back the NECK-PRO head r ...

    Additives
    Do not use any additives in the engine oil. This could damage the engine. ...

    Useful information
    This Operator's Manual describes all models and all standard and optional equipment of your vehicle available at the time of publication of the Operator's Manual. Country-specific differe ...