Mercedes-Benz 2008 SLK 350 Operator's Manual page 235

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 s button for dialing to begin.
DIALING appears in the audio display
while the telephone establishes the
connection.
Wait until the emergency call center
answers, then describe the emergency.
i
If no SIM card is in the mobile phone, NO
SERVICE appears in the audio display. In that
case, you only can make an emergency call on
the mobile phone itself, without the use of the
head unit.
234
TDMA/CDMA network phones
Placing a "911" emergency call using
audio head unit with the phone locked
Press h button to switch to
telephone operation.
CODE? appears in the audio display.
Enter 911 using the number keypad on
the audio head unit.
Press OK soft key or s button for
dialing to begin.
DIALING appears in the audio display
while the telephone establishes the
connection.
Wait until the emergency call center
answers, then describe the emergency.
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 s button for dialing to begin.
DIALING appears in the audio display
while the telephone establishes the
connection.
Wait until the emergency call center
answers, then describe the emergency.