Mercedes-Benz M-Class 2009 Owners Manual - Manual (Page 104)

Seats
102
X Switch on the ignition.
X Switching on: Press switch 1 .
Three blue indicator lamps 2 in the switch
come on.
X Press switch 1 repeatedly until the
desired ventilation level is set.
X Switching off: Press switch 1 repeatedly
until all indicator lamps 2 go out.
Seat heating
1 Front seat heating switch
2 Indicator lamps
The switches for the outboard rear seat
heating are located in the rear center console.
1 Rear seat heating switch
2 Indicator lamps
The red indicator lamps in the switch come
on to show which heating level you have
selected.
The seat heating switches from level
3 (high)
to level 2 after approximately 5 minutes.
The seat heating switches from level 2 to level
1 (low) after approximately 10 minutes.
The seat heating automatically switches off
after approximately 20 minutes.
X Switch on the ignition.
X Switching on: Press switch 1 .
Three red indicator lamps 2 in the switch
come on.
X Continue pressing switch 1 until desired
seat heating level is reached.
X Switching off: Press switch 1 repeatedly
until all indicator lamps 2 go out.
If one or more of the indicator lamps 2 in the
seat heating switch 1 are flashing, there is
insufficient voltage available since too many
electrical consumers are turned on. The seat
heating switches off automatically.
The seat heating will switch back on again
automatically as soon as sufficient voltage is
available.
Controls in detail