Mercedes-Benz 2003 M-Class - Manual (Page 131)

131
Controls in detail
Automatic climate control
Rear window defroster
The rear window defroster uses a large
amount of power. To keep the battery
drain to a minimum, switch off the defrost-
er as soon as the rear window is clear. The
defroster is automatically deactivated af-
ter approximately 6 to 17 minutes of oper-
ation depending on the outside
temperature.
Activating
̈ Switch ignition on.
̈ Press button F ( ୴ page 125).
The indicator lamp on the button lights
up.
Deactivating
̈ Press button F again.
The indicator lamp on the button goes
out.
Rear passenger compartment ventila-
tion and rear automatic climate control
Deactivating
For an improved cooling or heating output
in the front passenger compartment, you
can switch off the rear passenger compart-
ment ventilation.
̈ Press button § ( ୴ page 125).
The indicator lamp on the button lights
up.
The operation of the rear automatic cli-
mate control and the fresh air supply to
the rear compartment is shut off.
Activating
̈ Press button § again.
The indicator lamp on the button goes
out.
The rear automatic climate control
switches to automatic mode and fresh
air enters the rear compartment.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.
!
If the rear window defroster switches
off too soon and the indicator lamp
starts blinking, this means that too
many electrical consumers are operat-
ing simultaneously and there is insuffi-
cient voltage in the battery. The system
responds automatically by deactivating
the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster au-
tomatically turns itself back on.