See also:

Please bear the following in mind
The engine oils are matched to the performance of Mercedes-Benz engines and service intervals. You should therefore only use engine oils and oil filters that are approved for vehicles with mainten ...

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. ...

Checking tire pressure electronically
  Make sure that the SmartKey is in position 2 in the ignition lock.   Press the or button on the steering wheel to select the Service menu.   Press the or button to sel ...