Mercedes-Benz GLS Owner's Manual page 191

188 Climate control
Air vents in the B-pillar
Air vents above the second and third row of seats
(all vehicles except Mercedes-Maybach vehicles)
To set the airflow direction: hold air
#
vent 1 in the centre and move it accord‐
ingly.
To open or close: turn controller
#
as it will go.
Air vents above the second row of seats, towards
2 as far
the load compartment (Mercedes-Maybach vehi‐
cles)
To open or close: turn controller
#
as it will go.
1 as far