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 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 Roadside Roadside Assistance button does not light up during the system self-diagnosis.

 - The indicator lamp in the information information button does not light up during selfdiagnosis of the system.

 - the indicator lamp in the SOS button, Roadside Assistance button or information button continues to 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: Mercedes-Benz Customer Assistance Center under 1-800-FOR-MERCedes(1-800-367-6372) or 1-888-990-9007

 - Canada: Customer Service at 1-888-923-83

    See also:

    Storing the ball coupling
    WARNING Do not carry the ball coupling in the vehicle interior if it is not secured. Otherwise, you and others could be injured by the ball coupling being thrown around if you: - brake sharply ...

    Downhill gradients
    On long and steep gradients, you must reduce the load on the brakes by shifting early to a lower gear. This allows you to take advantage of the engine braking effect and helps avoid overheati ...

    THERMOTRONIC climate control with three individual climate modes
    The second-generation Mercedes CLS can be optionally fitted with an automatic climate control system which not only allows individual temperatures to be set for three zones - for the driver, the f ...