Mercedes-Benz GLC Owner's Manual page 129

Seats
126
Driver's and front-passenger seat
Rear seats
The three red indicator lamps in the button
indicate the heating level you have selected.
The system automatically switches down
from level 3 to level 2 after approximately
eight minutes.
The system automatically switches 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.
Turn the key to position 1 or 2 in the ignition
X
lock ( page 187).
Y
To switch on: press button : repeatedly
X
until the desired heating level is set.
To switch off: press button : repeatedly
X
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off.
i
If drive program E (
ted, the power of the seat heating is
reduced.
page 200) is selec-
Y