Page 179 of 426
177 Controls in detail
Audio system
Item
Page
1
CD changer mode selector
AUX mode selector
193
183
2
Single CD mode selector 
195
3
Radio mode selector
4
Mute function (radio)
187
Pause (CD)
199
5
Volume distribution
181
6
Sound settings
179
7
Display
8
Alphanumeric keypad
Item
Page
9
Speed dialing memory 
(telephone) in descending 
order
a
Accepting a call
(telephone)
205
b
Telephone mode selector
200
c
Speed dialing memory 
(telephone) in ascending 
order
201
d
Terminating a call
(telephone)
205
e
CD slot
f
CD ejection
195
Item
Page
g
Soft keys
178
h
Volume
179
j
Switching on/off
178
k
Manual tuning / seek 
tuning (radio)
185
Track search, reverse (CD)
198
l
Manual tuning / seek 
tuning (radio)
185
Track search,
fast forward (CD)
198 
         
        
        
     
        
        Page 182 of 426

180 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.Sound system*
You can either program the sound settings 
manually (
page 179) or choose settings 
via preset sound characteristics.
You can select from among the following 
settings:
STANDARD
: conventional stereo sound.
SURROUND
: the sound is set for better 
three-dimensional acoustic character-
istics.
SPEECH
: the sound is optimized for the 
spoken word.
Press O button repeatedly until STANDARD
, SURROUND
 or 
SPEECH
 appears 
in the display.
Press X or Y soft key repeatedly 
until the desired sound setting has 
been reached.
The sound is set accordingly.
or
Press 
RES
 soft key briefly.
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 
standard radio menu eight seconds 
after the last soft key is pressed. 
         
        
        
     
        
        Page 190 of 426

188 Controls in detailAudio systemScan search
Starting scan search
Press 
SC soft key.
SC will appear in the display. The 
radio 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 
disappears from the display.Introduction to satellite radio* 
(USA only)
SIRIUS satellite radio provides 100 chan-
nels of digital-quality radio, among others 
music, sports, news, and entertainment, 
free of commercials. SIRIUS satellite radio 
uses a fleet of high-power 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 call the SIRIUS 
Service Center (
page 193), or contact 
www.siriusradio.com
iAdditional satellite radio equipment 
and a subscription to a satellite radio 
service provider are required for the 
satellite radio operation described 
here. Feature description is based on 
preliminary information available at 
time of printing. 
iAt time of printing, no date for the avail-
ability of optional equipment required 
for satellite radio operation had been 
set.
Contact an authorized Mercedes-Benz 
Center for details and availability for 
your vehicle.
Note that categories and channels 
shown in illustrations are dependent on 
programming content delivered by the 
service provider. Programming content 
is subject to change. Therefore, 
channels and categories shown in 
illustrations and descriptions 
contained in this manual may differ 
from the channels and categories 
delivered by the service provider. 
         
        
        
     
        
        Page 192 of 426

190 Controls in detailAudio systemThe 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 191),
Tuning via station presets 
(page 190),
Tuning via scan search (
page 192).
Tuning via manual channel input 
(page 190).
Tuning via the program category list 
(page 191).
Tuning via station presets
Ten satellite radio station presets are 
available.
You can access the presets via number 
keys.Accessing via number keys
Enter number of preset you wish to 
select, e.g. 1.
The radio plays the station stored 
under this number and the PTY function 
changes to the category corresponding 
to the station.
Tuning via manual channel input
Example: tuning in channel 16
iThe system will tune to a default 
station if no station had been selected 
previously. 
         
        
        
     
        
        Page 194 of 426

192 Controls in detailAudio systemTuning via scan search
Scan search is characterized as follows:
Scan search plays a channel for 
approx. eight seconds and then skips 
to the next channel within the current 
category.
Scan search can be terminated 
manually.
Press 
SC soft key.
The search starts. SC appears in the 
display.
Press 
SC soft key again.
The search stops.Obtaining additional text information
Additional text information (artist, title) 
related to the current channel can be 
displayed.
Press 
INF
 soft key.
The title being played is displayed.
Press 
INF
 soft key again.
The name of the artist performing the 
title being played is displayed.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 selected 
station button.
The radio saves the current station at 
the memory preset selected. The 
memory preset selected appears in the 
status line, e.g. S3.
iIf a button is not pressed within 
four seconds, the radio will return to 
the standard display.
iThere are ten presets available.
An existing entry is overwritten in the 
memory list when a new entry is given. 
         
        
        
     
        
        Page 391 of 426

389 Technical terms
Tele Aid* System
(T
elematic A
larm I
dentification on 
D
emand)
The Tele Aid system consists of three 
types of response: automatic and 
manual emergency, roadside assis-
tance and information. Tele Aid is 
initially activated by completing a 
subscriber agreement and placing an 
acquaintance call.
The Tele Aid system is operational 
provided that the vehicle’s battery is 
charged, properly connected, not 
damaged and cellular and GPS 
coverage is available.Telematics*
A combination of the terms “tele-
communications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a lug 
wrench) with which threaded fasteners 
such as wheel bolts are tightened.
Tire speed rating
Part of tire designation; indicates the 
speed range for which a tire is 
approved.
Traction
Force exerted by the vehicle on the 
road via the tires.VIN
(V
ehicle I
dentification N
umber)
The number set by the manufacturer 
and placed on the body to uniquely 
identify each vehicle produced.
Voice control system*
1
Voice control system for car phones, 
portable cell phones and audio 
systems (radio, CD, etc.). 
1Feature description is based on preliminary infor-
mation at time of printing. At time of printing, no 
date for availability of voice control had been set. 
Contact an authorized Mercedes-Benz Center for 
details and availability for your vehicle model.  
         
        
        
     
        
        Page 414 of 426

412 Index
Side marker lamp bulbs, front 338
Side marker lamp bulbs, rear 340
Standing lamp bulbs, front 336, 338
Standing lamp bulbs, rear 340
Tail lamp bulbs 340
Turn signal lamp bulbs, 
front 336, 338
Turn signal lamp bulbs, 
rear 340
Wiper blades 341
Reporting
Safety defects 18
Research Octane Number see RON
Reset button in the 
instrument cluster 116, 130, 131
Resetting
All functions (control system) 130
All functions of a submenu 131
Fuel consumption 148
Maintenance service indicator 286
Trip odometer 117
REST 388Restraint system
Message in display 305
Restraint system see 
Infant and child restraint systems
Rims 367
Roadside Assistance 12
RON 268, 388
Roof rack* 226
Rubber parts
Cleaning 292
S
Safety
Occupant 60
Safety belts see Seat belts
Safety defects
Reporting 18
Safety systems
Driving 79
Satellite radio
additional text information 192
general information 188
manual channel input 190
storing of station 192Seat belt force limiter 69
Seat belt height adjustment
Front seats 45
Rear outer seats 45
Seat belt system
Message in display 319
Seat belt telltale 25
Seat belts 66
Cleaning 291
Fastening 43
Height adjustment 45
Proper use of 45, 68
Safety guidelines 64
Telltale 299
Seat cushion depth
Adjusting 103
Seat heating*
Switching off 104
Switching on 104 
         
        
        
     
        
        Page 415 of 426

413 Index
Seats 97
Adjusting 35
Easy entry/exit feature* 97
Heating* 104
Manual seat 36
Multicontour seat* 103
Power seat* 38
Split rear bench seat 230
Securing cargo
Cargo tie-down rings 233
Selecting
Automatic time change 
(Daylight Saving Time 
(DST) summer/winter) 137
Display for status indicator 134
station (satellite radio) 190
Selecting radio mode 183
Selector lever see gear selector lever
Self-test
BabySmart
TM air bag 
deactivation system 72
Tele Aid* 243Service
Parts 362
Service and Warranty Booklet
Loss of 363
Service and warranty information 10
Service life (tires) 279
Service see Maintenance
Service System see FSS
Setting
Convenience functions 132, 144
Cruise control 224
Date (day) 138
Date (month) 137
Date (year) 139
Daytime running lamp mode 140
Exterior rear view mirror 
parking position* 107
Higher speed in cruise control 225
Hours (clock) 135
Individual vehicle settings 130
Instrument lighting 116
Interior lighting delayed shut-off 143Key dependent memory 145
Lamps and lighting 
(control system) 139
Language, multifunction display 134
Locator lighting 141
Lower speed in cruise control 225
Miles/kilometers 
in speedometer 133
Minutes (clock) 136
Night security illumination 141
Parking position* for exterior 
rear view mirrors 146
Radio station 190
Slower speed in cruise control 225
Speed in cruise control 225
Speedometer display mode 133
Temperature (interior) 169
Temperature indicator 133
Time display mode (Clock) 137
Units
Speedometer 133
Temperature 133