See also:

Switching on/off
The three red indicator lamps in the button indicate the heating level you have selected. If the battery voltage is too low, the seat heating may switch off. Driver's and front-passenger seat ...

Mercedes-Benz M-Class
With the 2012 M-Class, Mercedes brings the comfortable, luxurious driving experience of its flagship S-Class sedan to its most popular SUV. If you don't like to be disturbed by the world around yo ...

Setting the rear-compartment air distribution using the rear control panel
Turn the SmartKey to position 2 in the ignition lock. Press rocker switch 13 or 16 up or down repeatedly until the desired air distribution symbol is shown in the display. ...