Mercedes-Benz SL Roadster 2012 Owner's Manual page 151

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Operating the climate control system
148
Problems with the rear window heating
Problem
The rear window heat-
ing has switched off
prematurely or cannot
be activated.
Activating/deactivating air-recircula-
tion mode
General notes
If you switch on air-recirculation mode, the
windows can mist up more quickly, in partic-
ular at low temperatures. Only use air-recir-
culation mode briefly to prevent the windows
misting up.
Activating/deactivating
Turn the key to position 2 in the ignition
X
lock (
page 155).
Y
To activate: press the g button.
X
The indicator lamp in the g button lights
up.
i
Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. When air-recir-
culation mode is activated automatically,
the indicator lamp in the g button is not
Possible causes/consequences and M M Solutions
The on-board voltage is too low because too many electrical con-
sumers are switched on.
Switch off any consumers that are not required, e.g. reading
X
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window heat-
ing can be activated again.
lit. Outside air is added after about
30 minutes.
To deactivate: press the g button.
X
The indicator lamp in the g button goes
out.
i
Air-recirculation mode is deactivated
automatically:
after around five minutes at outside tem-
R
peratures below approximately 5 †
after approximately five minutes if cool-
R
ing with air dehumidification is deactiva-
ted
after around 30 minutes at outside tem-
R
peratures above approximately 5 † if the
"Cooling with air dehumidification" func-
tion is activated
Convenience opening/closing using
the air-recirculation button
G
WARNING
When using convenience closing, you could
become trapped within the sweep of the clos-
ing window. There is a risk of injury.
Monitor the entire closing procedure when
using convenience closing. When closing,
make sure that no one has any parts of the
body within the closing area.
G
WARNING
During convenience opening parts of the body
could be drawn in or become trapped

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