2009 Mercedes SLR McLaren Owner's Manual - Page 167

Controls in detail Audio system Placing a "911" emergency call using audio head unit with the phone unlocked Press h button to switch to telephone operation. Enter 911 using the number keypad on the audio head unit. Press the SND key for dialing to begin. The telephone establishes the connection. Wait until the emergency call center answers, then describe the emergency. Accepting an incoming call Accepting an incoming call in telephone mode With an incoming call, a ringing tone can be heard and the caller's telephone number, or the name under which this telephone number has been saved in the telephone book, appears on the display. If the caller's number is not transmitted, CALL will appear in the display. Press the SND key to accept call. Accepting an incoming call in cassette, CD or radio mode If the telephone is activated in the background (receiving symbol S visible on display), the audio source is muted when a call is received. The ringing tone is heard and the caller's telephone number or the name under which this telephone number has been saved in the telephone book appears on the display. If the caller's number is not transmitted, CALL appears in the display. Press the SND key to accept the call. 167