Mercedes-Benz 2007 S 550 Operator's Manual page 427

Controls in detail
Automatic climate control
Automatic climate control panel, front
Item
1 AUTO mode for air distribution and
volume, left
2 Temperature control, left
3 Manual fan speed adjustment, left
4 Front defroster
426
Item
5 Air recirculation
6 Automatic climate control on/off
7 Residual engine heat and ventilation
(REST)
8 Rear window defroster
Item
9 Manual fan speed adjustment, right
a Temperature control, right
b AUTO mode for air distribution and
volume, right