Enter settings at the operating system - AR54.30-P-1000-02RAH

Activate the tire pressure monitoring system 

Before activating tire pressure monitoring system: correct tire pressure of all wheels.

1. Switch on ignition.
2. Press system select/voice control pushbutton (S110s3) repeatedly until the mileage is displayed on the multifunction display (A1p13).
3. Press the scroll forward/back pushbutton (S110s1) repeatedly until the tire pressure is displayed on the multifunction display (A1p13).
4. Press the reset button (A1s1).
   Fig 1: Identifying System Select/Voice Control, Scroll Forward/Back Pushbuttons And Multifunction Display

   Courtesy of MERCEDES-BENZ USA
5. Confirm the information shown on the multifunction display (A1p13) by pressing the + and -, setting of specific functions and volume control button (S111s1).

   The tire pressure is displayed a few minutes after the driver begins to drive the vehicle.

6. Switch off ignition.