See also:

PSI (pounds per square inch)
A standard unit of measure for tire pressure. ...

Roadside Assistance button
  Press and hold Roadside Assistance button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistance Center. The indicator lamp in Roadside Assistance but ...

Dialing a number from the phone book
If your mobile phone is able to receive calls, you can search for and dial a number from the phone book in COMAND at any time. – Press the or button on the steering wheel to select the Tel m ...