2008 MERCEDES-BENZ CLK550 Radio

218 Controls in detail
Audio system
Returning sound functions to factory
settings
Press O button to call up settings
menu in the display.
Press RES soft key briefly; the respec-
tive sound function is reset to its center
level.
or
Press and hold RES soft key until RESET
appears in the display.
The sound settings for bass and treble
are returned to their center level and
the volume is set to a predefined level.
Vehicles with sound system*:
The sound setting is reset depending
on the sound source activated.

Radio mode: STANDARD

CD/AUX mode: SURROUND

Telephone: SPEECH
The radio switches back to the stan-
dard radio menu four seconds after the
last soft key is pressed.
Adjusting volume distribution
Call up fader and balance functions by
pressing the P button.
Fader
Press P button repeatedly until
FADER appears in the display.
Press V or W soft key.The volume is distributed accordingly
between the front and rear of the vehi-
cle.
or
Press RES soft key briefly.
The fader is reset to its center level.
The radio switches back to the stan-
dard radio menu eight seconds after
the last soft key is pressed.
Adjusting balance
Press P button repeatedly until
BALANCE appears in the display.

219 Controls in detail
Audio system
Press X or Y soft key.
The volume is distributed between the
left and right sides of the vehicle.
or
Press RES soft key briefly.
The balance is reset to its center level.
The radio switches back to the stan-
dard radio menu eight seconds after
the last button is pressed.
Returning volume distribution to facto-
ry settings
Press P button to call up settings
menu in the display.
Press RES soft key briefly; the respec-
tive volume distribution is reset to its
center (flat) level.
or
Press and hold RES soft key until RESET
appears in the display.
The volume distribution settings for
fader and balance are set to their cen-
ter level.
The radio switches back to the stan-
dard radio menu four seconds after the
last soft key is pressed.
Telephone* muting
If your vehicle equipment includes a
Mercedes-Benz specified mobile phone*,
you can adjust its volume separately from
the volume of the audio system while the
telephone is being used.Connecting an external audio source
(AUX) to the radio
An external audio source (AUX) can be
connected to the audio system. The
cinch-connector for connecting the exter-
nal audio source (AUX) is located in the
glove box. Please contact an authorized
Mercedes-Benz Center for more informa-
tion.
1External audio source (AUX)
cinch-connector

221 Controls in detail
Audio system
Radio operation
Selecting radio mode
Press b button.
Calling up wavebands
You can choose from among the FM, AM
and WB wavebands.
Weather band (
page 224).Calling up wavebands for radios without
SAT*
Press FM or AM soft key to switch be-
tween FM and AM.
The FM and AM wavebands are called
up one after another.
or
Press WB soft key.
The weather band menu is called up.
The waveband currently selected
appears in the upper left-hand corner
of the display.
Calling up wavebands for radios with
SAT*
Press FM, AM or WB soft key repeatedly
until desired waveband has been se-
lected.
The FM, AM and WB wavebands are
called up one after another.The waveband currently selected
appears in the upper left-hand corner
of the display.
Selecting a station
The following options are available for se-
lecting a station:

Direct frequency input (page 222)

Manual tuning (page 222)

Automatic seek tuning (page 222)

Scan search (page 222)

Station memory (page 223)

Automatic station memory (Autostore)
(
page 223)
The station search proceeds in the follow-
ing frequency increments:

200 kHz in FM range

10 kHz in AM range
iFM waveband: 87.7......107.9 MHz
AM waveband: 530......1 710 KHz

222 Controls in detail
Audio system
Direct frequency input
Select desired waveband.
Press * button.
Enter desired frequency with buttons
1to R.Manual tuning
Select desired waveband.
Press S or Tbutton for approx-
imately three seconds.
Press button repeatedly until desired
frequency has been reached.
Step-by-step station tuning takes place
in ascending or descending order. Each
time the button is pressed, the radio
tunes further by 0.2 MHz. During man-
ual tuning, the radio is muted.
Automatic seek tuning
Select desired waveband.
Press S or T button briefly.
The radio will tune to the next highest
or next lowest receivable frequency.Scan search

Starting scan search
Select desired waveband.
Press SC soft key.
SC will appear in the display. The ra-
dio briefly tunes in all receivable
stations on the waveband selected.

Ending scan search
Press SC soft key or S or T.
The station last played will be se-
lected and
SC disappears from the
display.
iYou can only enter frequencies within the re-
spective waveband.
If a button is not pressed within four seconds,
the radio will return to the last station tuned.
iIf no station is received after two
consecutive scans of the complete frequency
range, then the scan stops at the frequency from
which it began.

223 Controls in detail
Audio system
Station memory
You can store ten AM and ten FM stations
in the memory.

Storing stations
Tune in desired station.
Press and hold desired station
button1 to R until a brief
signal tone is heard.
The frequency is stored on the se-
lected station button.

Calling up stations
Press desired station button1
to R briefly.Autostore – automatic station memory
The Autostore memory function provides
an additional memory level. The station
memory for manually stored stations is not
overwritten.

Calling up Autostore memory level and
storing stations
Press AS soft key briefly.
The radio switches to the Autostore
memory level.
AS and SEARCH ap-
pear in the display and the radio
finds the ten stations with the
strongest signals. These stations
are stored on the station buttons
1 to R in order of signal
strength.

Calling up stations
Press desired station button1
to R.

Leaving the Autostore memory level
Press FM or AMsoft key briefly.

224 Controls in detail
Audio system
Interrupting radio mode
The radio mode is interrupted by an incom-
ing call on the telephone* (
page 240)

Mute on
Press U button.
The radio mode is interrupted and
MUTED appears in the display.

Mute off
Press U button.
The radio mode is again active.
Weather band
Press WB soft key.
The weather band station last received
is tuned in.Selecting a weather band station
directly
Select desired weather band station
with buttons 1 to 7.
If a station cannot be tuned in, a search
is automatically started.
Search
Press S or T button to tune in
the next receivable weather band sta-
tion.Scan search

Starting scan search
Press SC soft key.
SC will appear in the display. The ra-
dio briefly tunes in all receivable
weather band stations.

Ending scan search
Press SC soft key or S or T.
The weather band station last
played will be selected and
SC dis-
appears from the display.
iIf no weather band station is received after
three consecutive scans of the complete fre-
quency range, then the scan stops at the chan-
nel with which it began and
NO WB FOUND
appears in the display.
If this happens, switch back to standard radio
mode.

225 Controls in detail
Audio system
Satellite radio*
SIRIUS satellite radio provides over 100
channels of digital-quality radio. That in-
cludes music, sports, news, and entertain-
ment, free of commercials. SIRIUS satellite
radio uses three high-orbit satellites to
broadcast 24 hours per day, coast to
coast.
This diverse, satellite-delivered program-
ming is available for a monthly subscrip-
tion fee.
For more information and service
availability, call the SIRIUS Service Center
(1-888-539-7474), or contact
www.siriusradio.com for USA or
www.siriuscanada.ca for Canada.Program categories
The channels are categorized. Categories
allow you to tune to stations broadcasting
a certain type of program (category mode)
(
page 227).
Calling up the SAT main menu
Press SAT soft key.
SAT is displayed in the upper left-hand
corner of the display.
Prior to activation of the satellite radio
service (
page 226).
After activation of satellite radio ser-
vice (
page 226).
iAdditional satellite radio equipment and a
subscription to a satellite radio service provider
are required for the satellite radio operation de-
scribed here.
Contact an authorized Mercedes-Benz Center
for details and availability for your vehicle.
Note that categories and channels shown in illus-
trations are dependent on programming content
delivered by the service provider. Programming
content is subject to change. Therefore, chan-
nels and categories shown in illustrations and
descriptions contained in this manual may differ
from the channels and categories delivered by
the service provider.
iSatellite radio service may be unavailable or
interrupted from time to time for a variety of rea-
sons, such as environmental or topographic con-
ditions and other things beyond the service
provider’s or our control. Service might also not
be available in certain places (e.g., in tunnels,
parking garages, or within or next to buildings) or
near other technologies.

226 Controls in detail
Audio system
Prior to activation of the satellite radio
service
The telephone number of the SIRIUS
Service Center (888-539-7474) is dis-
played.
Press ESN soft key.
The twelve-digit electronic serial num-
ber (ESN) of the SAT tuner* installed in
your vehicle is displayed.
This information is required to call the
SIRIUS Service Center for an activation re-
quest.After activation of the satellite radio
service
The satellite radio main menu appears.
The radio station selected last is audible,
provided it can be received.
The first channel 001 is called up and the
PTY system changes to All categories.
If no station can be received,
ACQUIRING
appears in the display.
If the Satellite radio service is not
activated,
ACQUIRING will also appear in the
radio display and
NO SAT will appear in the
multifunction display.Selecting a station
The following options are available:

Selecting a station using the selected
category (
page 227),

Tuning via station presets
(
page 226),

Tuning via scan search (page 228),

Tuning via manual channel input
(
page 227),

Tuning via the program category list
(
page 227).
Tuning via station presets
Ten satellite radio station presets are avail-
able.
You can access the presets via number
keys.
iCredit card information may also be re-
quired for your application.
The activation process takes approximately five
to ten minutes after calling the SIRIUS Service
Center.
iThe system will tune to a default station if no
station had been selected previously.