radio controls MERCEDES-BENZ C-Class 2004 W203 Comand Manual
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40 AudioRadio operation1No audio source has been switched on
2The radio is switched on
3Frequency band and the memory pre-
set, if applicable
4Frequency of the station selected5“SP” (memory) - appears if “Memory” 
instead of “Station search” or “Freq.” 
(depending on model) has been selec-
ted in the “Vehicle” submenu. Refer to 
“Control system” in chapter “Controls 
in detail” in your vehicle's operating in-
structions for further information. 
Press # at the COMAND control 
unit to switch on COMAND.
Press c at the COMAND control 
unit to switch to radio operation.
Repeatedly press key E or H at 
the multifunction steering wheel until 
display 2 appears.
Multifunction display 
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219
Info Services*/System settings
Auxiliary audio source
Turn the right-hand rotary/push-button 
v to highlight “Aux” in the main sys-
tem settings menu and press to con-
firm. 
The “Aux” menu will appear. The auxili-
ary audio source will switch on if it has 
been connected to the COMAND cont-
rol unit.
Adjusting the volume (
page 14).Adjusting the volume level of an auxilia-
ry audio source
Adjust volume of vehicle radio to a 
comfortable listening level.
Connect adapter cable to portable tape 
deck and to vehicle (socket in glove 
box).
Press ( button on COMAND unit.
Activate the “Aux” menu as described.
Press “Play” button on the portable 
tape deck.
Adjust the volume on the portable tape 
deck so that the audio system output is 
at or near the same comfortable level 
previously set in radio mode.
Volume can now be adjusted using 
either COMAND or volume controls on 
multifunction steering wheel.Muting auxiliary audio source
Press Ö. 
Symbol R will appear.
Canceling mute function
Press Ö again. 
Symbol R will disappear.
iThe sound adjustments for the auxiliary 
audio source are independent of those 
selected for the COMAND audio sour-
ces.
iOnly the volume setting of the tape play-
er can be controlled using the 
COMAND system.