Mercedes-Benz GL-Class 2012 Owners Manual - Manual (Page 110)

X Make sure that the SmartKey is in position
2 in the ignition lock.
X Use switch : to move the thigh cushion
into the desired position.
X Press the W or X button to adjust the
contour of the backrest to suit your back.
X Press button ? to move the point of
greatest backrest curvature downwards to
the lumbar region and press button = to
move it upwards to the upper back region.
X Use button ; to adjust the side bolsters
for optimum lateral support.
Adjusting the four-way lumbar
support
You can adjust the contour of the driver's seat
backrests individually to provide optimum
support for your back.
:
To raise the backrest contour
;
To soften the backrest contour
=
To lower the backrest contour
?
To harden the backrest contour
Switching the seat heating on/off
Switching on/off
The three red indicator lamps in the button
indicate the heating level you have selected.
i If the battery voltage is too low, the seat
heating may switch off.
One or more of the indicator lamps in the
seat heating button are flashing.
Driver's and front-passenger seat
Rear seats
The system automatically switches down
from level
3 to level 2 after approximately five
minutes.
The system automatically switches down
from level
2 to level 1 after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level
1.
108
Seats
Seats, steering wheel and mirrors