Mercedes-Benz SLR McLaren. Operator's Manual.

Controls in detail
Audio system
Quick-dialing
Press one of the desired number
buttons 4 to M longer than
1 second.
The telephone number saved under
that number will be dialed.
164
!
Please be aware that button 4
might already be reserved for an emergency
call number.
Emergency calls “911”
The following describes how to dial a “911”
emergency call using the audio system
head unit when a Mercedes-Benz specified
mobile phone is inserted in the phone cradle.
Unless otherwise specified, the descriptions
refer to the audio system head
unit.
Consult the separate telephone operating
instructions that came with your mobile
phone for information on how to place a
“911” emergency call on the mobile
phone.
Warning! G
The “911” emergency call system is a public
service. Using it without due cause is a criminal
offense.
The following conditions must be met for a
“911” emergency call:
Telephone must be switched on.
The corresponding mobile communications
network must be available.
i
Emergency calls may not be possible
with all telephone networks or if certain
network services and/or telephone
functions are active. Check with your
local service providers.
If you cannot make an emergency call, you
will have to initiate rescue measures
yourself.