Activating/deactivating the residual heat function

The residual heat function is only available in Canada 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.

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

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

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

Residual heat is deactivated 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:

    "Electronic crumple zone": even more safety in the M-Class
    As ever, the best accident is one which does not happen at all. The safety engineers at the Mercedes Technology Center are working intensively on this rather simple sounding statement, which in pr ...

    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 differenc ...

    Safety systems
    Display messages Possible causes/consequences and Solutions Risk of accident ABS (Anti-lock Braking System), ESP® (Electronic Stability Program), BAS (Brake Assist) ...