ECU MERCEDES-BENZ C-CLASS SALOON 2012 Workshop Manual

Depending on
the bicycle rack 's design, up to
th re e bicycles can be transpor ted on the bicycle
ra ck.
When mounted byattaching toball head 1,the
maximum load capacity is 75kg.
The load capacity is calculated from thewe ight
of the bicycle rack and the bicycle rack load.
The vehicle's driving characteristics will change
when a bicycle rack isfitted. Adapt your driving st
yle according ly. Drive carefully and maintain a
sa fe dis tance.
When using a bicycle rack , set the tyre pressure
fo r maximum loading on there ar axle of the
ve hicle. Further information on the tyre pressure
can be found in the tyre pressure table
(/ page 412).
Note s on loading
The lar gerth e dis tance between the load's
cent reof gr avity and the ball head, the greater
th e load on the trailer hitch.
Therefore, obser vethefo llowing no tes:
R mount heavy bicycles as close totheve hicle
as possible
R always distribute the load on the bicycle rack
as evenly as possible across theve hicle's
longitudinal axis
Mercedes-Benz recommends removing all
de tach able parts from bicycles (e.g. bask ets,
ch ild seats, rech arge able bat teries) before load‐
ing them onto the bicycle rack . This will impr ove
th e aerodynamic resis tance and centre of gr avity
of the bicycle rack. Alw
ays secure the bicycles topreve ntthem from
moving around and check them at regular inter‐
va ls to ensure that they are secure.
Do not use tarp aulins or other co vers. The driv‐
ing characteristics and rear view may be
impaired. In addition, aerodynamic resis tance
and the load on the trailer hitch will increase. Load distribution on
the bicycle rack
1 Vertical dis tance between centre of gr avity
and ball head
2 Horizon tal dis tance between centre of gr av‐
ity and ball head
3 The centre of gr avity is on theve hicle's
centre axis 242
Driving and pa rking
Internal use only

Instrument display
overview 1
Speedome ter
The segments on the speedome ter indica te
th est atus of thefo llowing sy stems: cruise
control / limiter / Active Dis tance Assi st
DISTRONIC
2 Outside temp erature
3 Time 4
Area for additional values (e xamp le:rev
counter): rev counter / navigation / ECO
display / consum ption / G-me ter / date
The fuel supply will be inter rupted toprotect
th e engine when there d mark on therev
counter (o verrev ving range) is reached.
5 Coolant temp erature display During normal operation,
the coolant tem‐
perature display is permitted torise to
12 0°C.
Ve hicles with 48 V on-board electrical sys‐
te m: POWER and CHARGE displ ays (electri‐
cal drive support and recuperation po wer of
th e electric mo tor)
6 Selected drive program Instrument display and on-board computer
245
Internal use only

Wi
-Fi Wi
-Fi connection overview
Yo u can use Wi-Fi toestablish a connection with
a Wi -Fi network and toaccess the Internet or
ot her network devices.
The following connection options are available:
R Wi-Fi connection
The Wi-Fi connection toaWi -Fi-capable
device, e.g. the cus tomer's mobile phone or
a ta blet PC is es tablished.
R Multimedia sy stem as a Wi-Fi hotspot
Using this function, a tablet PC or no tebook
can be connecte d,forex ample.
To establish a connection, you can use thefo l‐
lowing me thods:
R WPS PIN
The connection toa secure Wi-Fi network is
made via a PIN.
R WPS PBC
The connection toa secure Wi-Fi network is
made bypressing a button (push button).
R Security key The connection
toa secure Wi-Fi network is
made via a secu rity key.
Setting up Wi-Fi
Requ irements:
R The device tobe connec ted supports one of
th eth re e means of connection described
(/ page 277).
Mul timedia sy stem:
4 System 5
ö Connectivity
Ac tivating/deactivating Wi-Fi #
Switch Wi-FionO or off ª.
If Wi-Fi is deactivated ª, communication via
Wi -Fi toall devices is inter rupte d. This also
means that a connection tothe HERMES
communication module cann otbe es tab‐
lished. Then functions such as dynamic route
guidance with Live Traf fic Information are not
av ailable.
Connecting the multimedia sy stem with a
device via Wi-Fi
This function is not available if a HERMES com‐
munication module is ins talled. The type of connection es
tablished must be
selected on the multimedia sy stem and on the
device tobe connec ted.
% The connection procedure may dif fer
depending on the device. Follow the instruc‐
tions that are shown in the displa y.Fu rther
information (see the manufacturer's operat‐
ing instructions). #
Select Internet settings . #
Select Search for Wi-Fi networks.
Using a security key #
Select a Wi-Fi network in the list. #
Have the security key displa yed on the device
to be connec ted (see the manufacturer's
operating instructions). #
Ente rth is security key on the multimedia sys‐
te m. #
Confirm the entry with¡.
% All devices support a security key as a
means of connection. Multimedia sy
stem 277
Internal use only

#
Select Continue inthe multimedia sy stem.
Connecting using a security key#
Select Connect device to vehicle hotspot .
A secu rity key is displa yed. #
Select theve hicle from the device tobe con‐
nec ted. The vehicle is displa yed with the
SSID MB Hotspot XXXXX .#
Enter the security key which is shown in the
media display on the device tobe connec ted. #
Confirm the entry.
Connecting using NFC #
Select Establish a connection via NFC. #
Activate NFC on the mobile device (see the
manufacturer's operating instructions). #
Bring the mobile device into the NFC area of
th eve hicle (/ page319). #
Select Done.
The mobile device is now connected tothe
multimedia sy stem hotspot via NFC.
Generating a new security key: #
Select Set up hotspot . #
Select Generate security key .
A connection will be es tablished with the
newly crea ted security key. #
Tosave a security key:select Save.
When a new security key is sa ved, all existing
Wi -Fi connections are then disconnected. If
th eWi -Fi connections are being re-es tab‐
lished, the new security key must be ente red. Managing COMAND
Touch devices Re
quirements:
R The COMAND Touch app is ins talled on the
ex tern al device (e.g. tablet or smartphone).
R Wi-Fi is acti vated (/ page277) and the mul‐
timedia sy stem is confi gured as a Wi-Fi hot‐
spot (/ page 278).
Multimedia sy stem:
4 System 5
COMAND Touch
Connecting and authorising a new device #
Select Authorise a new device. #
Select Connect new device. #
Ente rth e security key in theex tern al device.
The Please start COMAND Touch on your
device and follow the instructions. message
appears. #
Select Continue. #
The connection requ est from the device
Accept. #
Ente rth e PIN shown on theex tern al device.
The device is authorised.
Au thorising a connected device #
Select Authorise a new device.
The devices already connec ted are displa yed. #
Select Continue using connected devices.
The Please start COMAND Touch on your
device and follow the instructions. message
appears. #
Select Continue. #
The connection requ est from the device
Accept. #
Ente rth e PIN shown on theex tern al device.
The device is authorised. Multimedia sy
stem 279
Internal use only

Importing/exporting data
* NO
TELoss of da tadue topremature
re mo val #
Do not remo vethe data storage
medium when data is being expor ted.
Mercedes-Benz is not liable for any loss of
data. Re
quirements:
R The vehicle is stationar y.
R The ignition is switched on or theve hicle has
been star ted.
R The SD card is inser ted (/ page 348) or the
USB device is connecte d (/page 349).
Multimedia sy stem:
4 System 5
System backup #
Select Import data orExport data.
Importing #
Select a data storage medium.
A prom ptappears asking whe ther youre ally
wish to overwrite the cur rent da ta. If da ta originates from ano
ther vehicle, this is recog‐
nised du ring da tareading.
The multimedia sy stem is restar ted once the
data has been impor ted.
% Current vehicle settings can be edited af ter
th e import.
Exporting
If PIN pr otection is activated, your PIN is reques‐
te d. #
Ente rth efo ur-digit PIN. #
Select a data storage medium.
The data is expor ted. The data export may
ta ke several minutes. Ac
tivating/deactivating PIN pr otection Re
quirements:
To unlo ckthe PIN:
R There is an Internet connection.
R A Mercedes me account exists at https://
me.secure.mercedes-benz.com. R
The Personalisation service is active
(/ page 282).
Multimedia sy stem:
4 System 5
PIN protection
Setting the PIN #
Select Set PIN. #
Enter a four-digit PIN. #
Enterth efo ur-digit PIN again.
If bo thPINs match, PIN pr otection is active.
Changing the PIN #
Select Change settings. #
Enterth e cur rent PIN. #
Select Change PIN . #
Set a new PIN.
Ac tivating PIN pr otection for data export #
Select Change settings .
Confirm with th e PIN. #
Select Protect data export.
Ac tivate Oor deacti vate ª the function. Multimedia sy
stem 281
Internal use only

Importing/exporting a user profile
Re
quirements:
R There is an Internet connection
(/ page 341).
R A Mercedes me account exists at https://
me.secure.mercedes-benz.com.
R The Personalisation service is active.
R The function is available in your count ry.
Multimedia sy stem:
4 System 5
g Personalisation
5 Manual export/import
Importing a user profile #
Select Import profiles from the server.
The The profile import overwrites the exist-
ing profiles. Do you want to continue? mes‐
sage appears. #
Select Yes.
User profiles are impor ted.
Exporting a user profile #
Select Export profiles to the server.
User profiles are expor ted. %
Only individual profiles can be impor ted or
ex por ted. The individual profiles are alw ays
collectively impor ted or expor ted.
% Certain settings, such as address book
ent ries or pr evious destinations from the
navigation sy stem, are not expor ted.
Setting user profile options
Multimedia sy stem:
4 System 5
g Personalisation #
Highlight a profile. #
Select ¥options.
The following options are available:
R Rename
R Delete
R Reset
% The guest profile cannot be dele ted or
re named. So
ftwa reupdates Information on software updates
The multimedia sy
stem displa ysa cor responding
message when a software update isavailable.
The availability of this function is dependent on
th e count ry.
Depending on the source, you can per form
va rious update s: Source of
the
update Up
date type
Up dates via mobile
phone Na
vigation map, sys‐
te m updates, Digital
Owner's Manual
Up dates via an exter‐
nal storage medium,
e.g. a USB flash drive Na
vigation maps %
Software updates via mobile phone requ ire
an active Internet connection forth eve hicle.
This is not available in all countries. For fur‐
th er information on connecting tothe Inter‐
net, see (/ page 340). Multimedia sy
stem 283
Internal use only

Ad
vantages of software updates
Software updates ensure your vehicle's tech nol‐
ogy is up-to-date.
In order tocons tantly impr ovethequ ality of our
services you will recei vefuture software updates
fo ryo ur multimedia sy stem, the Mercedes me
connect services and your vehicle's communica‐
tion module. These will be sent to you via the
mobile phone connection in your vehicle and, as
an option, ins talled automaticall y.Yo u can moni‐
to rth est atus of your software updates on the
Mercedes me Portal and find information about
po tential inno vations.
Yo ur advantages at a glance:
R Con veniently recei vesoftware update s via
th e mobile phone network
R Impr ovesth equ ality and availability of
Mercedes me connect services
R Keeps your multimedia sy stem and communi‐
cation module up-to-date
Fu rther information about software updates can
be found at https://me.secure.mercedes-
benz.com Car
rying out software updates
Requ irements:
R There is an Internet connection
(/ page 340).
R For automatic so ftwa reupdates: your
ve hicle has a permanently ins talled commu‐
nication module.
Multimedia sy stem:
4 System 5
Software update
Au tomatic so ftwa reupdates #
Activate Automatic online updates O.
The software upda tes will be downloaded
and ins talled automaticall y.
The cur rent status of the software update is
displa yed.
Manual software updates #
Switch off Automatic online updates ª. #
Select a software update from the list and
st art the update. Ac
tivating a so ftwa reupdate #
Restart the sy stem.
Fu nction of important sy stem updates
Impor tant sy stem updates may be necessary for
th e security of your multimedia sy stem's data.
Please ins tallth ese updates, otherwise the
security of your multimedia sy stem cann otbe
ensured.
% If automatic online updates are activated,
the sy stem updates will be downloaded auto‐
matically (/ page 284).
As soon as a sy stem update is available for
download, a cor responding message appears on
th e media displa y.
Yo u ha vethefo llowing selection options:
R Download
The sy stem update will be downloaded in the
bac kground.
R Details
Info rm ation about the pending sy stem
update is displa yed.
R Later 284
Multimedia sy stem
Internal use only

Blue
tooth ®
profile overview Blue
tooth ®
profile
of the mobile phone Fu
nction
PBAP (Phone Book
Access Profile) Contacts are auto‐
matically displa
yed in
th e multimedia sys‐
tem
MAP (Message
Access Profile) Message functions
can be used Te
lephony operating modes overview
Depending on your equipment, thefo llowing tel‐
ephony operating modes are available:
R A mobile phone is connec tedto the multime‐
dia sy stem via Blue tooth®
(/ page 316).
R Two mobile phones are connected with the
multimedia sy stem via Blue tooth®
(two
phone mode) (/ page317). Infor
mation on telephony
The following situations can lead tothe call
being disconnected while theve hicle is in
motion:
R there is insuf ficient network co verage inthe
area
R you mo vefrom one GSM or UMTS transmit‐
te r/receiver area (cell) into ano ther and no
communication channels are free
R the SIM card used is not compatible with the
network available
R a mobile phone with "Twincard" is logged into
the network with the second SIM card at the
same time
The multimedia sy stem supports calls in HD
Vo ice ®
for impr oved speech qualit y.Arequ ire‐
ment forth is is that the mobile phone and the
mobile phone network pr ovider of the person
yo u are calling suppo rtHD Voice ®
.
Depending on thequ ality of the connection, the
vo ice quality may fluctuate. Connecting a mobile phone (Blu
etoo th®
te l‐
ephony)
Re quirements:
R Blue tooth ®
is activated on the mobile phone
(see the manufacturer's operating instruc‐
tions).
R Blue tooth ®
is activated on the multimedia
sy stem (/ page276).
Mul timedia sy stem:
4 Telephone 5
ª Devices
Sear ching for a mobile phone #
Select Connect new device . #
Select Start search on the system .
The available mobile phones are displa yed. If
a new mobile phone is found, it is indicated
by the# symbol.
Connecting a mobile phone (authorisation
using Secure Simple Pairing) #
Select the mobile phone.
A code is displa yed in the multimedia sy stem
and on the mobile phone. 316
Multimedia sy stem
Internal use only

in
the second stage toenable an optimal
service.
An ove rview of the data transmit ted can be
fo und in there spective term s of use for
Mercedes me connect services. These can be
obtained in the Mercedes me Portal: https://
me.secure.mercedes-benz.com
Data processing
The data transmitted within the scope of the call
is dele ted from the processing sy stem af terthe
call is finished, in so far as this data is not being
used forot her activated Mercedes me connect
services.
The incident-specific data is processed and
st ored in the Mercedes-Benz Cus tomer Centre
and, if requ ired toprocess the incident, forw ar‐
ded tothe service partner authorised bythe
Mercedes-Benz Cus tomer Centre. Please take
no te ofthe data pr otection information on the
Mercedes me Internet page https://
www.mercedes.me or in there corded message
immediately af ter calling the Mercedes-Benz
Cus tomer Centre. %
The recorded message is not available in
eve rycountr y. Mercedes me connect
Information on Mercedes me connect
Mercedes me connect pr
ovides thefo llowing
services:
R Accident and breakdown manage ment (me
button)
R Mercedes-Benz emergency call sy stem (auto‐
matic emer gency call and SOS button)
The Mercedes-Benz Cu stomer Centre and the
Mercedes-Benz emer gency call centre are availa‐
ble foryo u around the cloc k.
The me button and the SOS button can be found
on theve hicle's overhead control panel
(/ page 331).
Yo u can also call the Mercedes-Benz Cus tomer
Centre using the multimedia sy stem
(/ page 333).
Please no tethat Mercedes me connect is a
Mercedes-Benz service. In emer gencies, firs t call th
e national emer gency services using the
st andard national emer gency service telephone
numbers. In emer gencies, you can also use the
Mercedes-Benz emer gency call sy stem
(/ page 337).
Obser vethe conditions of use for Mercedes me
connect and other services. These can be
obtained in the Mercedes me Portal: https://
me.secure.mercedes-benz.com
Fu rther information about Mercedes me con‐
nect, the pr ovided service scope and operation:
https://moba.i.daimler.com/mar kets/ece-r ow/
baix/cars/connectme/en_GB/#emotions/
St artseite.html
Information on Mercedes me connect Acci‐
dent and Breakdown Management
The Accident and Breakdown Management can
include thefo llowing functions:
R Supplement tothe Mercedes-Benz emer‐
ge ncy call sy stem (/ page 337)
If necessar y,the conta ct person at the
Mercedes-Benz emer gency call centre for‐
wa rdsth e call toMercedes me connect Acci‐
dent and Breakdown Management. Forw ard‐ 336
Multimedia sy stem
Internal use only

ing
the call is ho wever not possible in all
countries.
R Breakdown assi stance byate ch nician on
location and/or theto wing away oftheve hi‐
cle tothe nearest Mercedes-Benz service
cent re
Yo u may be charge dfo rth ese services.
More information about Mercedes me connect
services can be obtained in the Mercedes me
Po rtal: https://me.secure.mercedes-benz.com
Data trans ferred duri ng Mercedes me con‐
nect call services
The data transfer red during a Mercedes me con‐
nect call depends on:
R The reason for initiation of the call
R The service that is selec ted in thevo ice con‐
trol sy stem
R The activated Mercedes me connect services
Which data is transfer redfo rth e services can be
ta ke n from the cur rently valid term s of use.
These can be obtained in the Mercedes me por‐
ta l: https://me.secure.mercedes-benz.com Mercedes-Benz emer
gency call sy stem Information on
the Mercedes-Benz emer‐
ge ncy call sy stem
The Mercedes-Benz emer gency call sy stem only
functions in areas where mobile phone co verage
is available from the mobile phone network pro‐
viders. Insuf ficient network co verage from the
mobile phone network pr oviders may result in an
emergency call not being transmitted.
The Mercedes-Benz emer gency call sy stem is
av ailable for at least tenye ars starting from the
manufacturing date.
The ignition must be switched on before an auto‐
matic emergency call can be made.
% The Mercedes-Benz emerge ncy call system
is activated at thefa ctor y.
Overview of the Mercedes-Benz emer gency
call sy stem
The Mercedes-Benz emer gency call sy stem can
help todecisively reduce the time between an
accident and the ar riva l of emer gency services
at the site of the accident. It helps locate an
accident site in places that are dif ficult to
access. The emer
gency call can be made au tomatical ly
( / page 337) or manually (/ page 338). Only
make emer gency calls if you or others are in
need of rescue. Do not make an emergency call
in theeve nt of a breakdown or a similar situa‐
tion.
Displ ays in the media display
SOS READY : eCallavailable
SOS NOT READY: the ignition is not on or eCall
is not available.
During an active emer gency call, Gappears
in the displa y.
Yo u can find more information on there gional
av ailability of eCall at: https://www.mercedes-
benz-mobile.com/ext ra/ecall/
% Ifth ere is a malfunction in the emer gency
call sy stem (e.g. a fault with the speaker,
microphone, airbag, SOS button), a cor re‐
sponding message appears inthe multifunc‐
tion display of the instrument clus ter.
Tr iggering an automatic emer gency call
Re quirements:
R The ignition is switched on. Multimedia sy
stem 337
Internal use only