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 coolant temperature and on the interior temperature that has been set.
The blower will run at a low speed regardless of the airflow setting.
If you activate the residual heat function at high temperatures, only the ventilation will be activated.
► Turn the SmartKey to position 0 in the ignition lock or remove it.
► To activate: press the 
button.
The indicator lamp in the 
button
lights
up.
► To deactivate: press the 
button.
The indicator lamp in the 
button
goes
out.
Residual heat is deactivated
automatically:
• after approximately 30 minutes
• when the ignition is switched on
• if the battery voltage drops
• if the coolant temperature is too low
See also:
4MATIC (permanent four-wheel drive)
Never tow the vehicle with one axle
raised. This may damage the transfer case.
Damage of this sort is not covered by the
Mercedes-Benz Limited Warranty. All
wheels must remain either on the grou ...
Important safety notes
WARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A clogged
filter will reduce the air volume to the interior
...
Setting the rear-compartment air
vents
Setting the center vents in the rear
compartment
Example: center vents with rear control panel
1 Rear-compartment air vent thumbwheel
2 Rear-compartment air vent, right
3 Rear control panel
4 ...