Page 9 of 106

Reset
............................................... 33
Time ................................................ .31T
Telephone Accepting/ending a call ................... 49
Ending an active call ........................51
Incoming call ................................... 49
Making a call via speed dia l............. 51
Operating options ............................ 42
Outgoing call ................................... .50
Sending DTMF tones ........................ 52
Switching the hands-free micro-
phone on/off ................................... 51
Telephone basic menu
Bluetooth ®
interface ........................ 48
Telephone book
Calling up ........................................ .53
Importing external data ...................52
Multifunction steering wheel ............ 55
Telephone mode
Redialing .......................................... 51
Time
Setting the time ............................... 31
Track
Selecting .......................................... 93
Treble
Setting ............................................. 21U
Using the telephone ............................49 V
Vehicle Data acquisition ................................. 9
Video DVD
DVD menu ....................................... 99
Fast forward/rewind ........................98
Function restrictions ........................96
Interactive content ........................101
Pause function ................................. 98
Picture settings ................................ 99
Selecting a film/title ........................98
Selecting a scene/chapter ..............98
Setting the language ......................100Stop function
................................... 98
Subtitles ........................................ 101
Video DVD mode
DVD playback restrictions ...............96
Switching to ..................................... 97
Volume
Adjusting (multifunction steering
wheel) .............................................. 18
Phone calls ...................................... 21 W
Weather Band Searching for a channel ...................63
Switching on .................................... 63 Index
7
Page 10 of 106

Operating safety
Important safety notes
G
WARNING
If you operate integrated communication
equipment in the vehicle when driving, you
will be distracted from traffic conditions. You
could also lose control of the vehicle. There is
a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is cov-
ering a distance of 44 feet (approximately
14 m) every second. G
WARNING
Modifications to electronic components, their
software as well as wiring can impair their
function and/or the function of other net-
worked components. In particular, systems
relevant to safety could also be affected. As a
result, these may no longer function as
intended and/or jeopardize the operating
safety of the vehicle. There is an increased
risk of an accident and injury.
Never tamper with the wiring as well as elec-
tronic components or their software. You
should have all work to electrical and elec-
tronic equipment carried out at a qualified
specialist workshop.
If you make any changes to the vehicle elec-
tronics, the general operating permit is ren-
dered invalid.
! Note: This equipment has been tested
and found to comply with the limits for a
Class A digital device, pursuant to Part 15
of the FCC Rules. These limits are designed
to provide reasonable protection against
harmful interference when the equipment
is operated in a commercial environment.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the
instruction manual, may cause harmful
interference to radio communications.
This equipment complies with FCC radiation
exposure limits set forth for uncontrolled
equipment and meets the FCC radio fre-
quency (RF) Exposure Guidelines in Supple-
ment C to OET65.
This equipment has very low levels of RF
energy that is deemed to comply without
maximum permissive exposure evaluation
(MPE). However, it is recommended to install
it at a distance of at least 8 inches (20 cm)
between the radiation source and a person's
body (not including limbs such as hands,
wrists, feet and legs). Correct use
Always observe the following when using the
audio equipment:
R the safety notes in this manual
R national road traffic regulations
i Using roof carriers may impair the correct
functioning of a roof antenna (phone, sat-
ellite radio, GPS).
Retrofitting metalized plastic films to the
windows can affect radio reception. It can
also lead to poorer reception of all other
antennas (e.g. emergency call antennas)
inside the vehicle.
i Protection against theft: this device is
equipped with technical provisions to pro-
tect it against theft. Further information on
protection against theft can be obtained
from an authorized Mercedes-Benz Center. Declarations of conformity
Vehicle components which receive
and/or transmit radio waves USA:
"The wireless devices of this vehicle
comply with Part 15 of the FCC Rules. Oper- 8
Introduction
Page 11 of 106

ation is subject to the two following two con-
ditions: 1) These devices may not cause
harmful interference, and 2) These devices
must accept any interference received,
including interference that may cause unde-
sired operation. Changes or modifications not
expressly approved by the party responsible
for compliance could void the user’s authority
to operate the equipment."
Canada: "The wireless devices of this vehicle
comply with Industry Canada license-exempt
RSS standard(s). Operation is subject to the
following two conditions: (1) These devices
may not cause interference, and (2) These
devices must accept any interference, includ-
ing interference that may cause undesired
operation of the device." Audio system features
These Operating Instructions describe all
standard and optional equipment available
for your audio device at the time of going to
print. Country-specific differences are possi-
ble. Please note that your audio equipment
may not offer all the features described. This
also applies to safety-relevant systems and
functions. The equipment in your vehicle may
therefore differ from that shown in the
descriptions and illustrations.
The original purchase agreement lists all sys-
tems installed in your vehicle. Contact an
authorized Mercedes-Benz Center if you have
any questions about equipment or operation. Function restrictions
For safety reasons, some functions are
restricted or unavailable while the vehicle is
in motion. You will notice this, for example,
because you will not be able to select certain
menu items. Data stored in the vehicle
A wide range of electronic components in
your vehicle contain data memories.
These data memories temporarily or perma-
nently store technical information about:
R The vehicle's operating state
R Incidents
R Malfunctions
In general, this technical information docu-
ments the state of a component, a module, a
system or the surroundings.
These include, for example:
R operating conditions of system compo-
nents, e.g. fluid levels
R the vehicle's status messages and those of
its individual components, e.g. number of
wheel revolutions/speed, deceleration in
movement, lateral acceleration, accelera-
tor pedal position
R malfunctions and defects in important sys-
tem components, e.g. lights, brakes
R vehicle reactions and operating conditions
in special driving situations, e.g. air bag
deployment, intervention of stability
control systems
R ambient conditions, e.g. outside tempera-
ture
This data is of an exclusively technical nature
and can be used to:
R assist in recognizing and rectifying mal-
functions and defects
R analyze vehicle functions, e.g. after an acci-
dent
R optimize vehicle function
The data cannot be used to trace the vehicle's
movements.
When your vehicle is serviced, technical infor-
mation can be read from the event data mem-
ory and malfunction data memory.
Services include, for example:
R repair services
R service processes Introduction
9 Z
Page 12 of 106
R
warranties
R quality assurance
It is read by employees of the service network
(including manufacturers) using special diag-
nostic devices. More detailed information is
obtained from it, if required.
After a malfunction has been rectified, the
information is deleted from the malfunction
memory or is continually overwritten.
When operating the vehicle, situations are
conceivable in which this technical data, in
connection with other information (if neces-
sary, under consultation with an authorized
expert), could be traced to a person.
Examples include:
R accident reports
R damages to the vehicle
R witness statements
Further additional functions that have been
contractually agreed upon with the customer
allow certain vehicle data to be conveyed by
the vehicle as well. The additional functions
include, for example, vehicle location in case
of an emergency. 10
Introduction
Page 13 of 106
Audio 20 operating system
................12
Multifunction steering wheel .............18
Operating Audio 20 .............................19
Basic functions of Audio 20 ...............20
Rear Seat Entertainment ....................24 11At a glance
Page 14 of 106
Audio 20 operating system
Overview
Example
Function Page
0043
Display 16
0044
Control panel with a single
CD drive
13
0087
Controller 14
Audio 20 components
Audio 20 consists of:
R the control panel with a single CD drive
R the display
R the controller
In addition, Audio 20 can be operated via the
multifunction steering wheel. 12
Audio 20 operating systemAt a glance
Page 15 of 106
Audio 20 control panel
Function Page
0043
002A
Switches to radio
mode 60
Switches wavebands 61
Switches to SatRadio mode 64
0044
00BE
Activates navigation
mode (only in conjunction
with Becker ®
MAP PILOT ) 40
0087
003A
Switches to audio CD
or MP3 mode 69
0085
002B
Activates telephone
mode 48
0083
00F8
Ejects CD 69
0084
Disc slot
Insert CDs 68
Remove CDs 68
006B
0037
Delete button • Deletes characters
• Deletes an entry Function Page
006C
Number pad
• Selects stations via the
station presets
62
• Stores stations manually 62
• Telephone number entry 50
• Sends DTMF tones 52
• Character entry
006D
0049
Selects a station
using the station search
function 61
Selects the next track 71
Fast forward 72
006E
Adjusts the volume 21
006F
0043
Switches Audio 20 on/
off 20
0070
0048
Selects a station
using the station search
function 61
Selects the previous track 71
Rewinds 72
0071
0066
Calls up the basic
menu 17Audio 20 operating system
13At a glance
Page 16 of 106
Function Page
0072
0061
Accepts a call 49
Dials a number 50
Redial 51
0073
0063
Mute 21
Switches the hands-free
system on/off Function Page
0074
0076
Rejects a call 49
Ends an active call 51
Audio 20 controller
Introduction You can use the controller to select functions
in the display. To do so, move the selection
bar.
0043
Controller The controller can be:
R
pressed briefly or pressed and held
R turned clockwise or counterclockwise
R slid to the left, to the right, up or down In this way you can:
R
scroll within menus
R select menu items
R exit menus
i If your vehicle is equipped with Becker ®
MAP PILOT, you can slide the controller
diagonally to move the map ( Ypage 40). 14
Audio 20 operating systemAt a glance