2004 Mercedes S-Class Owner's Manual - Page 249

Controls in detail Useful features i The indicator lamp on the Information button ¡ remains illuminated in red for approximately ten seconds during the system self-check after turning the ignition on (together with the SOS button and the Roadside Assistance button •). See System self-check ( page 243) when the indicator lamp does not come on in red or stays on longer than approximately ten seconds. If the indicator lamp in the Information button ¡ is illuminated continuously and no voice connection to the Response Center was established, then the Tele Aid system could not initiate an Information call (e.g. the relevant cellular phone network is not available). The message INFO - CALL FAILED appears in the multifunction display. Information calls can be terminated using the tbutton on the multifunction steering wheel. Upgrade Signals The Tele Aid system processes calls using the following priority: Automatic emergency - First priority Manual emergency - Second priority Roadside Assistance - Third priority Information - Fourth priority Should a higher priority call be initiated while you are connected, an upgrade (alternating) tone will be heard, and the appropriate indicator lamp will flash. If certain information such as vehicle identification number or customer information is not available, the operator may need to retransmit. During this time you will hear a beep and voice contact will be interrupted. Voice contact will resume once the retransmission is completed. Once a call is concluded, a beep will be heard and the respective indicator lamp will stop flashing. The COMAND system operation will resume. ! If the indicator lamps do not start flashing after pressing one of the buttons or remain illuminated (in red) at any time, the Tele Aid system has detected a fault or the service is not currently active, and may not initiate a call. Visit an Mercedes-Benz Center and have the system checked or contact the Response Center at 1-800-756-9018 (in the USA) or 1-888-923-8367 (in Canada) as soon as possible. 248