2009 Mercedes SLR McLaren Owner's Manual - Page 216

Controls in detail Useful features The speaker volume of a Tele Aid call can be adjusted when using the volume control on the audio system or on the multifunction steering wheel. To raise, turn the rotary volume control on the audio system clockwise or press button æ on the multifunction steering wheel. To lower, turn the rotary volume control on the audio system control counterclockwise or press button ç on the multifunction steering wheel. System self-check The system performs a self-test after you have switched on the ignition. Warning! Emergency calls An emergency call is initiated automatically following an accident in Emergency Tensioning Devices (ETDs) or air bags have deployed. An emergency call can also be initiated manually ( page 217). Once the emergency call is in progress, the indicator lamp in the SOS button will begin to flash. The message Connecting Call appears in the multifunction display. When the connection is established, you see the message Call Connected in the multifunction display. All information relevant to the emergency, such as the location of the vehicle (determined by the GPS satellite location system), vehicle model, identification number and color are generated. G If the indicator lamps in the SOS button, in the Roadside Assistance button, and/or in the Information button do not come on during the system self-check, or if any of these indicators remain illuminated continuously in red and/or the message Tele Aid Inoperative is displayed in the multifunction display after the system self-check, a malfunction in the system has been detected. If a malfunction is indicated as outlined above, the system may not operate as expected. In case of an emergency, help will have to be summoned by other means. Have the system checked at the nearest Mercedes-Benz Center or contact the Response Center at 1-800-756-9018 (in the USA) or 1-888-923-8367 (in Canada) as soon as possible. 216