Seat Heating Problem - Mercedes-Benz M-Class Operator's Manual

Problems with the seat heating
Problem
The seat heating has
switched off
prematurely or cannot
be switched on.
Switching the seat ventilation on/off
Activating/deactivating
The three blue indicator lamps in the buttons
indicate the ventilation level you have
selected.
Make sure that the SmartKey is in position
X
2 in the ignition lock.
To switch on: press button : repeatedly
X
until the desired ventilation 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
ventilation may switch off.
i
You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature ( page 93). The seat
Y
ventilation of the driver's seat
automatically switches to the highest level.
Possible causes/consequences and M Solutions
The on-board voltage is too low because too many electrical
consumers are switched on.
Switch off electrical consumers that you do not need, such as
X
the rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating will
switch back on automatically.
Seats
109
Z