2000 Mercedes ML-Class Owner's Manual - Page 159

Instruments and controls Tele Aid Operation Driving Instrument cluster display Practical hints Car care Technical data Index 156 Important! 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 your Mercedes-Benz Light Truck 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. Upgrade Signals 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 client information is not available, the operator may need to retransmit. During this time you will hear a chirp and voice contact will be interrupted. Voice contact will resume once the retransmission is completed. Once a call is concluded, a chirp will be heard and the appropriate indicator lamp will stop flashing. The MCS system operation will resume.