Page 185 of 464

185 Controls in detail
Automatic climate control*
Automatic mode (basic setting)
Press automatic mode switchU.
The indicator lamp on the automatic 
mode switchU comes on.
The temperature, air volume and air 
distribution will be adjusted automati-
cally.
Press automatic mode switchU 
again.
The indicator lamp on the automatic 
mode switchU goes out.
The temperature, air volume, and air 
distribution are no longer adjusted au-
tomatically.
Setting the temperature
Use the temperature control switches 
‚andƒto separately adjust the air 
temperature on each side of the passenger 
compartment. You should raise or lower 
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C). 
Increasing
Press red temperature control 
switch‚4or6.
The automatic climate control system 
will correspondingly adjust the interior 
air temperature.
The selected temperature will be indi-
cated in displaye.
Item
1
Air volume control, manual
2
UAutomatic mode
3
PDefrosting
4
‚To increase temperature on 
the left side
5
´Automatic climate control 
on/off
6
‚To increase temperature on 
the right side
7
FRear window defroster
8
Air distribution control, manual
9
TResidual heat/ventilation
a
±Air condition on/off
b
ƒTo lower temperature on the 
right side
c
ƒTo lower temperature on the 
left side
d
,Air recirculation
e
Display
!With the climate control system 
switched off, the air flow and the air 
circulation are deactivated.
Only choose this setting temporarily to 
prevent the windows from fogging up.
iWhen operating the automatic climate 
control system in automatic 
modeU, you will only rarely need to 
adjust the temperature, air volume and 
air distribution. 
     
        
        Page 186 of 464

186 Controls in detailAutomatic climate control*Decreasing
Press blue temperature control 
switchƒborc.
The automatic climate control system 
will correspondingly adjust the interior 
air temperature.
The selected temperature will be indi-
cated in displaye.
Adjusting air volume
Turn air volume control1 
(page 185) to the desired position.
The indicator lamp on the automatic 
mode switchU (
page 185) goes 
out. The air volume is no longer adjust-
ed automatically.
The following symbols are found on the 
control:
Adjusting air distribution
Turn air distribution control8 
(page 185) to the desired position.
The indicator lamp on the automatic 
mode switchU (
page 185) goes 
out. The air distribution is no longer ad-
justed automatically.
The following symbols are found on the 
control:
Air recirculation mode
Switch to air recirculation mode to prevent 
unpleasant odors from entering the vehicle 
from the outside. This setting cuts off the 
intake of outside air and recirculates the 
air in the interior.
Activating
Press air recirculation switch, 
(page 185).
The indicator lamp on the air recircula-
tion switch, comes on.
Symbol
Function
between1 
and6
Ventilation with increasing 
blower speed
Symbol
Function
Z
Directs air to the windows
b
Directs air into the entire 
vehicle interior
Y
Directs air to the footwells
a
Directs air through the 
center, side and cockpit air 
vents
Warning!
G
When the outside temperature is below 
41°F (5°C), only switch to air recirculation 
mode for short periods to prevent window 
fogging. 
     
        
        Page 190 of 464

190 Controls in detailAutomatic climate control*Windshield fogged up on the outside
Press automatic mode switchU.
The indicator lamp on the automatic 
mode switchU comes on.
Close cockpit air vent4 
(page 182).
Switch on the windshield wipers 
(page 53).Switching off the automatic climate 
control system
Switching off
Press automatic climate control on/off 
switch´.
The indicator lamp on the automatic 
climate control on/off switch´ 
comes on.
The indicator lamp on the automatic 
mode switchU goes out.
Displaye goes out.Switching on
Press automatic mode switchU.
The indicator lamp on the automatic 
mode switchU comes on.
Displaye comes on.
iWith automatic mode selected, the 
automatic climate control system 
prevents windows from fogging up.
iThis setting is only recommended when 
the retractable hardtop is open.
!With the climate control system 
switched off, the air flow and the air cir-
culation are deactivated.
Only choose this setting temporarily to 
prevent the windows from fogging up. 
     
        
        Page 192 of 464
192 Controls in detailAudio systemOperating and display elements 
     
        
        Page 193 of 464
193 Controls in detail
Audio system
Item
Page
1
CD changer mode selector
207
2
Single CD mode selector 
208
3
Radio mode selector
4
Mute function (radio)
200
Pause (CD)
215
5
Volume distribution
196
6
Sound settings
195
7
Display
8
Alphanumeric keypad
Item
Page
9
Speed dialing memory 
(telephone) in descending 
order
a
Accepting a call
(telephone)
221
b
Telephone mode selector
216
c
Speed dialing memory 
(telephone) in ascending 
order
218
d
Terminating a call
(telephone)
221
e
CD slot
f
CD ejection
209
Item
Page
g
Soft keys
194
h
Volume
195
j
Switching on/off
194
k
Manual tuning / seek 
tuning (radio)
199
Track search, reverse (CD)
214
l
Manual tuning / seek 
tuning (radio)
199
Track search,
fast forward (CD)
214 
     
        
        Page 194 of 464
194 Controls in detailAudio systemButton and soft key operation
In these instructions, the alphanumeric 
keypad (right side of radio panel) and the 
function buttons (left side of radio panel) 
are referred to as “buttons”. The four keys 
below the display panel are referred to as 
“soft keys”.
Operation
Switching the unit on/off
Switching on
Turn the SmartKey in the starter switch 
to position1 or2 (
page 35). 
If the audio system was on as you 
removed the SmartKey from the starter 
switch, the audio system will 
automatically come back on as you 
turn the SmartKey to position1 or2.
or
Press
D
button.
!Do not press directly in the display 
face. Otherwise, the display will be 
damaged.
iIf the radio is switched on without the 
SmartKey in the starter switch, it will 
automatically switch off again after 
approx. 30 minutes.
If your vehicle is equipped with a 
telephone, the display may prompt you 
to enter your PIN (GSM network) or 
code (TDMA or CDMA network). 
     
        
        Page 195 of 464

195 Controls in detail
Audio system
Switching off
Remove the SmartKey from the starter 
switch.
or
Press
D
button.
Adjusting the volume
Turn rotary control of
E
button.
The volume will increase or decrease 
depending on the direction turned.Adjusting sound functions
The bass and treble functions are called up 
by pressing the O button.
Settings for bass and treble are stored 
separately for the AM and FM wavebands, 
weather band, CD mode and telephone 
mode.
Bass
Press O button repeatedly until BASS
 appears in the display.
Press 
+ or
– soft key to increase or 
decrease tone level accordingly.
or
Press 
RES
 soft key briefly to reset bass 
tones to their center level.
The radio switches back to the 
standard radio menu eight seconds 
after the last soft key is pressed.
iShould excessively high temperatures 
occur while the audio system is being 
operated, the display will dim. If tem-
peratures continue to rise, 
HIGH TEMP
 
will appear in the display, after which 
the audio system will be switched off 
for a cooling-down period.
iIf your vehicle equipment includes a 
Mercedes-Benz specified mobile 
telephone*, you can adjust its volume 
separately from the volume of the 
audio system while the telephone is 
being used. 
     
        
        Page 196 of 464

196 Controls in detailAudio systemAdjusting treble
Press O button repeatedly until TREBLE
 appears in the display.
Press 
+or
– soft key to increase or 
decrease tone level accordingly.
or
Press 
RES
 soft key briefly to reset treble 
tones to their center level.
The radio switches back to the 
standard radio menu eight seconds 
after the last soft key is pressed.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.
The radio switches back to the 
standard radio menu four seconds 
after the last soft key is pressed.Adjusting balance
Press P button.BALANCE
 appears in the display.
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 
standard radio menu eight seconds 
after the last button is pressed.