Mercedes-Benz SLR McLaren. Operator's Manual.

Controls in detail
Audio system
Telephone operation Various car telephone functions and operating
steps for the car telephone can be
Warning! G
performed and displayed via the audio system.
Please do not forget that your primary responsibility
is to drive the vehicle. A driver’s
attention to the road must always be
his/her primary focus when driving. For
your safety and the safety of others, we recommend
that you pull over to a safe location
and stop before placing or taking a telephone
call.
If you choose to use the telephone1 while
driving, please use the hands-free device
and only use the telephone when road,
weather and traffic conditions permit. Some
jurisdictions prohibit the driver from using a
cellular telephone while driving a vehicle.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet
(approximately 14 m) every second.
1 Observe all legal requirements.
160
Further operating instructions not covered
here can be found in the operating
instructions for the multifunction steering
wheel and the telephone.
Switching on the telephone
Press h button.
If you have programmed an unlock
code for the telephone, you must enter
the code now.
Enter the code using buttons 4
to M.
If necessary, correct number entered
with the CLR key. Press key briefly to
delete the last digit entered; press key
and hold to delete the complete number.
Press the OK key after entering correct
code.
The telephone is unlocked. If you have
entered the wrong code, you must repeat
the entering procedure with the
correct code.
Switching off the telephone
Press h button repeatedly until
PHONE OFF appears in the display.
The receiving symbol in the display
disappears.
Adjusting the volume
Turn control knob a during telephone
operation.
The volume increases or decreases depending
on the direction in which the
knob is turned.
i
The volume can be adjusted separately
for the telephone and radio.