Climate control, Operating the climate control systems – Mercedes-Benz GL-Class 2014 Owners Manual User Manual
Page 163
Problems with the rear window defroster
Problem
Possible causes/consequences and M
M Solutions
The rear window
defroster has
deactivated
prematurely or cannot
be activated.
The battery has not been sufficiently charged.
X
Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Activating/deactivating air-
recirculation mode
General notes
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the
vehicle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
Activating/deactivating
The operation of air-recirculation mode is the
same for all control panels.
X
Turn the SmartKey to position 2 in the
ignition lock (
Y
page 167).
X
To activate: press the d button.
The indicator lamp in the d button lights
up.
i
In the event of high pollution levels (3-
zone automatic climate control only) or at
high outside temperatures, air-
recirculation mode is automatically
activated. When air-recirculation mode is
activated automatically, the indicator lamp
in the d button is not lit.
Outside air is added after about
30 minutes.
X
To deactivate: press the d button.
The indicator lamp in the d button goes
out.
i
Air-recirculation mode deactivates
automatically:
R
after approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
R
after approximately five minutes if
cooling with air dehumidification is
deactivated
R
after approximately 30 minutes at
outside temperatures above
approximately 41 ‡ (5 †) if the "Cooling
with air dehumidification" function is
activated
Activating/deactivating the residual
heat function
General notes
The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat
of the engine to continue heating the
stationary vehicle for up to 30 minutesafter
Operating the climate control systems
161
Climate
control