Mercedes-Benz E-Class Wagon 2017 Operator's Manual page 134

132 Climate control
Close the air vent when you heat the
#
vehicle.
At high outside temperatures, open the
#
air vent and switch on the A/C func‐
tion.
Requirement:
Automatic climate control is activated.
1 Air vent controller
2 Air vent
To open or close: turn controller
#
left or right.
1 to the