Mercedes-Benz SLK-CLASS Operator's Manual page 6

Controls in detail
Audio system
GSM network phones
Placing a "911" emergency call using
audio head unit with the phone locked
Press h button to switch to
telephone operation.
PIN? appears in the audio display.
Enter 911 using the number keypad on
the audio head unit.
soft key or s button for
Press OK
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.
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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.
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.
soft key or s button for
Press OK
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.