Mercedes Benz 2008 sl 550 Benutzerhandbuch

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Controls in detail
Automatic climate control
Deactivating
Press button 
(
The indicator lamp on the button goes 
out.
The residual heat is automatically turned 
off:
when the ignition is switched on
after about 30 minutes 
if the battery voltage drops
Ventilated glove box
The glove box has its own air vents that 
allow for cooling ventilation when the auto-
matic climate control system is activated.
Glove box
1 Thumbwheel
2 Air vent
Opening the air vent
Make sure the air vent in the glove box 
is unobstructed.
Turn thumbwheel
1 upwards.
Closing the air vent
Turn thumbwheel
1 downwards.
i
You should keep air vent 
2 closed when 
outside temperatures are low.