System self-test

After you have switched on the ignition, the system carries out a self-diagnosis.

WARNING A malfunction in the system has been 
A malfunction in the system has been detected if one of the following conditions occurs:
the indicator lamp in the SOS button does not light up during the system selfdiagnosis.
the indicator lamp in the Assistance button does not light up during Roadside
Assistance button does not light up during the system self-diagnosis.
The indicator lamp in the button does not light up during selfdiagnosis information button does not light up during selfdiagnosis of the system.
the indicator lamp in the SOS button, or  information button continues to Roadside Assistance button or be lit red information button continues to be lit red after the system self-diagnosis.
The Tele Aid Inoperative or Tele Aid
Not Activated message appears in the multifunction display after the system selftest.
If a malfunction is indicated as outlined above, the system may not operate as expected. In the event of an emergency, assistance must be summoned by other means.
Have the system checked at the nearest authorized Mercedes-Benz Center or contact the following service hotlines:
USA: Response Center under
888-990-9007
Canada: Customer Service at
1-888-923-8367

    See also:

    Cleaning the seat belts
      Use clean, lukewarm water and soap solution. Do not clean the seat belts using chemical cleaning agents. Do not dry the seat belts by warming them above 176 °F (80 °C) or placing th ...

    Front air bags
    The front air bags increase protection for the driver's and front-passenger's head and chest. Driver's air bag 1 deploys in front of the steering wheel; front-passenger front air bag 2 depl ...

    MOExtended tires (tires with run-flat properties)
    MOExtended tires (tires with run-flat properties) allow you to continue driving your vehicle even if one or more tires are entirely deflated. MOExtended tires may be used only in conjunction ...