2014 MERCEDES-BENZ C-Class display

Display settings
Display design
You can adjust the brightness of the display
to suit the prevailing ambient light.
X To call up the basic menu: press0066.
X Switch to the submenu bar by sliding 00520064
the controller.
X Select Settings Settings using the controller (slide
009500520096 or turn 00790052007A) and press 0098to confirm.
X Select Display Display and press 0098to confirm.
X Select Brightness
Brightness, Day Mode
Day Mode,Night
Night
Mode
Mode orAutomatic
Automatic and press0098to con-
firm.
i If you select Brightness
Brightness, an adjustment
scale appears which you can use to adjust
the brightness manually.
When the Automatic Automatic setting is selected,
Audio 20 evaluates the readings from the
automatic vehicle light sensor and
switches between the display designs auto-
matically. Time settings
Accessing the date/time settings
menu
X To call up the basic menu: press0066.
X Switch to the submenu bar by sliding 00520064
the controller.
X Select Time
Time by sliding 009500520096or turning
00790052007Athe controller and press 0098to con-
firm. Setting the time
X Select Set Time
Set Time by sliding00970052or turning
00790052007Athe controller and press 0098to con-
firm. X
To set the time: slide006400520097or turn
00790052007Athe controller and press 0098to con-
firm. Setting the date
X Select Set Date
Set Date by sliding00970052or turning
00790052007Athe controller and press 0098to con-
firm. Time settings
31System settings

X
Select Yes
YesorNo
No and press 0098to confirm.
If you select No
No, the process will be can-
celed.
After you select Yes
Yes , all seat adjustments
are reset to the default values (factory set-
ting). Rear view camera
Important safety notes
The rear view camera is only an aid. It is not
a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering and park-
ing. When maneuvering or parking, make sure
that there are no persons, animals or objects
in the area in which you are maneuvering.
Under the following circumstances, the rear
view camera will not function, or will function
in a limited manner:
R the tailgate is open
R in heavy rain, snow or fog
R at night or in very dark places
R if the camera is exposed to very bright light
R if the area is lit by fluorescent light or LED
lighting (the display may flicker)
R if there is a sudden change in temperature,
e.g. when driving into a heated garage in
winter
R if the camera lens is dirty or obstructed
R if the rear of your vehicle is damaged. In
this event, have the camera position and setting checked at a qualified specialist
workshop. Activating/deactivating the display
If your vehicle is equipped with a rear view
camera, you can choose to have the rear view
camera switch on automatically. When you
engage reverse gear, the image from the rear
view camera will then be shown automatically
on the Audio display. After completion of the
maneuver, the audio display returns to the
previous screen.
i Further information on the rear view cam-
era driving system can be found in the vehi-
cle Operator's Manual.
X Press the 0066function button.
The system menu appears.
X Select Settings Settings by turning00790052007Athe con-
troller and press 0098to confirm.
X Select Activation by R gear
Activation by R gear and press
0098 to confirm.
The function is switched on 0073or off 0053,
depending on the previous status. 38
Rear view cameraVehicle functions

your mobile phone (see the mobile phone
operating instructions).
i Not all mobile phones available on the
market are equally suitable. You can obtain
more detailed information about suitable
mobile phones and about connecting Blue-
tooth ®
-capable mobile phones to Audio 20
on the Internet at
http://www.mbusa-mobile.com. Or call
the Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
(1-800-367-6372 )(for the USA) or Cus-
tomer Relations at 1-800-387-010 0(for
Canada).
i Some displays (e.g. the signal strength)
depend on the supported version of the
Hands-Free Profile. Connecting a mobile phone
General information Before using your mobile phone with Audio 20
for the first time, you will need to authorize it.
Device-specific information on connecting
Bluetooth ®
-capable mobile phones can be
found on the Internet at http://
www.mbusa-mobile.com . Or call the
Mercedes-Benz Customer Assistance Center
at 1-800-FOR-MERCedes (1-800-367-6372)
(for the USA) or Customer Relations at
1-800-387-010 0(for Canada).
When you authorize a new mobile phone, it is
connected automatically.
Connecting comprises:
R searching for a Bluetooth ®
-capable mobile
phone
R subsequently authorizing it
You can authorize up to 15 mobile phones.
During connection, the phone book, call lists
and text messages are automatically down-
loaded to Audio 20. This function must be
supported by the connected mobile phone.
You can suppress the automatic download of telephone data by deactivating the "Import
contacts" function (Y
page 55).
Searching for a mobile phone X
Press the 002Bbutton on Audio 20.
X Select Connect Device
Connect Device in the telephone
basic menu using the controller (slide
0052 0064and turn 00790052007A) and press 0098to con-
firm. X
Select Search Search for
forPhone
Phone and press 0098to
confirm.
A message appears.
X Select Start Start Search
Search and press 0098to con-
firm.
Audio 20 scans for Bluetooth ®
devices
within range and enters them into the Blue-
tooth ®
phone list.
If a new phone is found, it appears in the
list with the 00D3symbol.
The duration of the search depends on the
number of Bluetooth ®
telephones within
range and their characteristics.
Symbols in the Bluetooth ®
phone list Sym-
bol Explanation
00D3
New mobile phone in range, but
not yet authorized
0068
Authorized mobile phone
0036
Currently connected mobile
phone44
Telephony via the Bluetooth ®
interfaceTelephone

Sym-
bol Explanation
00DC
Mobile phone in range and
authorized 00DC
(gray)
Mobile phone not in range, but
already authorized
The Bluetooth
®
telephone list shows all
mobile phones within range and all previously
authorized mobile phones, whether or not
they are in range.
i If the Bluetooth ®
telephones list is already
full, you will be requested to de-authorize a
mobile phone (Y page 47). If Audio 20
does not find your mobile phone, external
authorization (Y page 46) may be neces-
sary.
i If you call up the telephone list again, the
unauthorized devices are removed from the
list. To update the Bluetooth ®
telephone
list, start a new search.
Authorizing a mobile phone X
Select the mobile phone that is not yet
authorized from the Bluetooth ®
phone list
by turning 00790052007Athe controller.
X Select the list symbol to the right of the
entry by sliding 00520096the controller and
press 0098to confirm.
X Select Authorize Authorize and press0098to confirm.
The input menu for the passkey appears. The passkey is any one to sixteen-digit num-
ber combination which you can choose your-
self. You must enter the same number com-
bination in Audio 20 and in the Bluetooth
®
-
capable mobile phone (see the mobile phone
operating instructions).
i Some mobile phones require a passkey
with four or more digits.
If you reauthorize a mobile phone following
deauthorization, you can select a different
passkey.
X To enter a passkey in Audio 20: press the
number keys in succession.
0054is highlighted after the first number
has been entered.
or
X Select the numbers one after another by
turning 00790052007Athe controller and press 0098
to confirm. Then, select 0054.
X To confirm an entry in Audio 20: press
0098 the controller.
X Now enter the same passkey in the mobile
phone.
To make entries on the mobile phone: if
the Bluetooth ®
connection is successful, you
will be requested to enter the passkey
(access code, passcode), see the mobile
phone operating instructions.
X Enter the same passkey in the mobile
phone as already entered in Audio 20.
i After entering the passkey, you may also
need to enter a confirmation in your mobile
phone to connect calls. Please check your
mobile phone display.
If the Audio 20 display shows the Author‐
Author‐
ization failed ization failed message, you may have
exceeded the prescribed time period.
Repeat the procedure.
The mobile phone is connected to Audio 20
(authorized). You can now use the Audio 20
hands-free function to make calls on your
mobile phone. Telephony via the Bluetooth
®
interface 45Telephone Z

Option 2: via Secure Simple Pairing:
to
connect via Secure Simple Pairing, the mobile
phone (or Bluetooth ®
audio device) must sup-
port Bluetooth ®
Version 2.1. Audio 20 gener-
ates a six-digit numeric code that appears
simultaneously on both devices that will be
connected. X
If the numeric code on both devices
matches, confirm Yes
Yes by pressing 0098.
If you select Yes
Yes, authorization is continued
and the mobile phone is connected.
If you select No
No, the process will be can-
celed.
X Confirm the message on the mobile phone. External authorization
If Audio 20 is unable to detect your mobile
phone, this may be due to your mobile phone
security settings. In this case, please check
to see whether your mobile phone can find
the Audio 20 system. The Bluetooth ®
device
name of Audio 20 is MB Bluetooth
MB Bluetooth.
Please note the following: some mobile
phones require that you establish the con-
nection to Audio 20 again once you have
entered the passkey (see the mobile phone
operating instructions). The mobile phone
cannot otherwise be authorized.
X Select Connect Device
Connect Device in the telephone
basic menu by sliding 00520064and turning 00790052007A
the controller and press 0098to con-
firm.
The Bluetooth ®
telephone list appears.
X Select Search
Search via viaPhone
Phone and press 0098to
confirm.
A message appears. X
Start the Bluetooth ®
search on the mobile
phone (see the mobile phone operating
instructions).
X Select Audio 20 (MB Bluetooth) (MB Bluetooth) on the
mobile phone.
X Option 1: when requested to do so, enter
the passkey on the mobile phone and then
in the Audio 20 system.
X Option 2: confirm the numeric code on the
mobile phone and in the Audio 20 system
(Secure Simple Pairing).
With both options, you see the prompt Do Do
you want to be
you want to be
authorized? authorized? on the display.
X If you select Yes
Yes, the mobile phone will be
authorized. The messages Waiting for
Waiting for
a Connection to a Connection to dev.>... dev.>... andConnecting Bluetooth
Connecting Bluetooth
Profiles...
Profiles... are displayed. If the connec-
tion is successful, you see the telephone
basic menu and the connected mobile
phone is entered.
If you select No
No, the process will be can-
celed. 46
Telephony via the Bluetooth ®
interfaceTelephone

Reconnecting automatically
Audio 20 always searches for the last mobile
phone connected.
If no connection can be made to the most
recently connected mobile phone, the system
searches for the mobile phone that was con-
nected before that one. Switching between mobile phones
If you have authorized more than one mobile
phone, you can switch between the individual
phones.
i You can only switch to another authorized
mobile phone if you are not currently mak-
ing a call.
X Select the mobile phone in the Bluetooth ®
telephones list by turning 00790052007Athe con-
troller and press 0098to confirm.
The selected mobile phone is searched for
and connected if it is within Bluetooth ®
range and if Bluetooth ®
is activated.
Only one mobile phone can be connected
at any one time. The currently connected
mobile phone is indicated by the 003Bdot in
the Bluetooth ®
telephones list. De-registering (deauthorizing) a
mobile phone
Mercedes-Benz USA, LLC recommends de-
authorization in Audio 20 as well as in the
mobile phone. Subsequent authorization may
otherwise fail.
X Press the 002Bbutton on Audio 20.
X Select Connect Device
Connect Device in the telephone
basic menu by sliding 00520064and turning
00790052007A the controller and press 0098to con-
firm.
The Bluetooth ®
telephone list appears.
X Select the desired mobile phone in the
Bluetooth ®
telephones list. X
Select the list symbol to the right of the
entry by sliding 00520096the controller and
press 0098to confirm.
X Select De-Authorize
De-Authorize and press0098to con-
firm.
A prompt appears asking whether you
really wish to de-authorize this device.
X Select Yes YesorNo
No and press 0098to confirm.
If you select Yes
Yes, the device will be deleted
from the phone list.
If you select No No, the process will be can-
celed.
i Before re-authorizing the mobile phone,
you should also delete the device name MB
MB
Bluetooth
Bluetooth from your mobile phone's Blue-
tooth ®
list. Displaying connection details
X Press the 002Bbutton on Audio 20.
X Select Connect Device
Connect Device in the telephone
basic menu by sliding 00520064and turning
00790052007A the controller and press 0098to con-
firm.
The Bluetooth ®
telephone list appears.
X Select the mobile phone from the list.
X Select the list symbol to the right of the
entry by sliding 00520096the controller and
press 0098to confirm.
X Select Details Details and press 0098to confirm.
The following information concerning the
selected mobile phone is shown:
R Bluetooth ®
name
R Bluetooth ®
address
R availability status (shown after a search)
R authorization status
X To close the detailed display: turn
00790052007A , slide 009700520064,009500520096 or press 0098the
controller. Telephony via the Bluetooth
®
interface 47Telephone Z

Telephone basic menu (Bluetooth
®
interface)
X Press the 002Bbutton.
If the connected telephone is ready for use,
the following display appears (example): 0043
Telephone status
0044 Signal strength of mobile phone network
Ä
0087 Receiver icon 0071or0075
0085 To display call lists
0083 Character bar
0084 Bluetooth ®
name of the currently con-
nected mobile phone
006B To display the Audio 20 phone book
X Press 002B.
When the connected mobile phone is ready
for use, the telephone basic menu appears.
i Bars 0044show the current signal strength
of the mobile phone network. If all bars are
filled, you have optimum reception.
If no bars are shown, reception is either
very poor or there is none at all.
The receiver symbol shows whether a call
is active/being connected 0075or not 0071.
Text message display in the telephone
basic menu The
Text Message Text Message menu item is only availa-
ble if the Bluetooth ®
phone supports the MAP
Bluetooth ®
profile ( Message AccessProfile).
The downloading of text messages from the
Bluetooth ®
phone must have been com- pleted. The menu item is otherwise grayed
out.
If you have an unread text message, the
0083
mail symbol is displayed. The symbol disap-
pears once you have read the text message.
The ú mail symbol is displayed as soon as
the text message memory is full. The symbol
disappears once you delete at least one text
message.
You can deactivate the automatic download
function for text messages stored in the
phone (Y page 55).
You can choose not to display the stored text
messages by activating the "Hide data" func-
tion (Y page 55). Reception and transmission volume
Once the mobile phone has been authorized,
you can optimize the transmission and recep-
tion volume settings. Find information on the
optimal setting for your mobile phone on the
Internet at
http://www.mbusa-mobile.com. Or call
the Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
(1-800-367-6372) (for the USA) or Customer
Relations at 1-800-387-010 0(for Canada).
i Incorrect settings may have an impact on
the quality of calls.
X Press 002B.
X Select Phone
Phone from the telephone basic
menu by turning 00790052007Athe controller and
press 0098to confirm.
X Select Connect Phones Connect Phones and press0098to
confirm.
X Select an authorized mobile phone from
the list by turning 00790052007Athe controller.
X Select the list symbol to the right of the
entry by sliding 00520096the controller and
press 0098to confirm.
X Select Reception Volume
Reception Volume orTransmis‐ Transmis‐
sion Volume
sion Volume and press0098to confirm. 48
Reception and transmission volumeTelephone

0043
Scale with indicator showing current vol-
ume
X Select a volume setting by turning 00790052007A
the controller.
X To close the setting scale: press0098or
slide 009500520096 . Using the telephone
Incoming call
Rejecting or accepting a call When you receive a call, you will hear a ring
tone and the incoming call will appear in the
display.
i Depending on the mobile phone, the
Audio 20 ring tone may differ from the one
you set. You could hear one of the follow-
ing:
R the mobile phone ring tone
R the Audio 20 ring tone
R the Audio 20 ring tone and the mobile
phone ring tone
The name and number of the caller are dis-
played if:
R the caller's details are stored in the phone
book
R the caller has enabled own number sending
and
R the "Hide data" function is deactivated
(default setting) (Y page 55).
Otherwise, the following appears (example): X
To accept: press the0061button on
Audio 20 or on the multifunction steering
wheel.
or
X Press 0098the controller.
X To reject: press the0076button on
Audio 20 or on the multifunction steering
wheel.
or
X Select Reject
Reject using the controller (slide
00950052or turn 00790052007A) and press 0098to confirm.
Once you have accepted the call, you can use
hands-free mode. You can adjust the call vol-
ume (Y page 21). For more information, see
the "Functions available during a call" section
(Y page 51).
i You can also accept a call if the display is
showing a display other than the telephone
mode. Once you have accepted the call, the
display shows telephone mode. After the
call is finished, you see the display of the
previous main application again.
The display does not switch to telephone
mode if you:
R hide the window using the 0038button
next to the controller
R accept the call using the 0066button on
the multifunction steering wheel
R accept the call using the 0061button on
Audio 20 Using the telephone
49Telephone Z