Mercedes-Benz M-Class Owner's Manual page 100

i
If the battery voltage is too low, the seat
heating may switch off.
Driver's and front-passenger seat
Rear-compartment seats
The system automatically switches down
from level 3 to level 2 after approximately
eight minutes.
The system automatically switches down
from level 2 to level 1 after approximately ten
minutes.
The system automatically switches off
approximately 35 minutes after it is set to
level 1.
Make sure that the key is in position 1 or
X
2 in the ignition lock.
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.
Problems with the seat heating
The seat heating has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
Switch off electrical consumers that you do
X
not need, such as the rear window heating
or interior lighting.
Switching the seat ventilation on/off
Activating/deactivating
The three blue indicator lamps in the buttons
indicate the ventilation level you have selec-
ted.
i
If the battery voltage is too low, the seat
ventilation may switch off.
Make sure that the key is in position 1 or
X
2 in the ignition lock.
To switch on: press button : repeatedly
X
until the desired ventilation level is set.
i
You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature (
Y
tilation of the driver's seat automatically
switches to the highest level.
To switch off: press button : repeatedly
X
until all the indicator lamps go out.
Seats
page 84). The seat ven-
Z
97