2012 MERCEDES-BENZ A-CLASS HATCHBACK Owners Manual

The trailer battery may not be charged from
the power supply.
X To switch the connected power supply
on or off: turn the key in the ignition lock to
position 2or 0respectively.
When it leaves the factory, your vehicle's
trailer socket is equipped with a permanent
power supply and a power supply that is
switched on via the ignition lock.
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin
10.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
You can find more information about instal-
ling the trailer electrics at a qualified special- ist workshop. Bulb failure indicator for LED lamps
i If LED lamps are fitted in the trailer, an
error message may appear in the multi-
function display even if there is no fault. The
reason for the error message could be that the current has fallen below the minimum
of 50 mA.
To ensure reliable operation of the bulb failure
indicator, each LED chain in the trailer lighting must be guaranteed a minimum current of
50 mA. Trailer with 7-pin connector
General notes Trailer with 7-pin connector:
you can con-
nect to the 13-pin socket on the ball coupling
using an adapter or, if necessary, an adapter
cable. Both can be obtained at a qualified
specialist workshop. Fitting the adapter !
Make sure that there is sufficient cable
play so that the cable cannot become
detached when cornering.
! Remove the installed adapter cable
before folding in the ball coupling. Other-
wise, damage may occur to the rear
bumper and the adapter cable. X
Open the socket cover.
X Insert the plug connector with lug :into
groove =on the socket. Turn bayonet con-
nection ;clockwise to the stop.
X Let the cover engage.
X If you are using an adapter cable, secure
the cable to the trailer with cable ties. 206
Towing a trailerDriving and parking

Useful information
............................208
Important safety notes ....................208
Displays and operation ....................208
Menus and submenus ......................211
Display messages ............................. 229
Warning and indicator lamps in the instrument cluster ............................257 207On-board computer and displays

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos- sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 24). Important safety notes
G
WARNING
Operating the integrated information systems and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is a risk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pull over to a safe
location and make entries only while the vehi-
cle is stationary. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety. The operating
safety of your vehicle may be impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
You must observe the legal requirements for
the country in which you are currently driving when operating the on-board computer.
The on-board computer only shows messages
or warnings from certain systems in the mul- tifunction display. You should therefore make
sure your vehicle is operating safely at all times. Otherwise, a vehicle that is not oper-
ating safely may cause an accident.
For an overview, see the instrument panel
illustration (Y
page 30). Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con- trol knob.
The brightness control knob is on the bottom
left of the instrument cluster (Y page 30).
X Turn the brightness control knob clockwise
or anti-clockwise.
If the light switch is set to Ã,Tor
L, the brightness is dependant upon
the brightness of the ambient light.
i The light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated. Coolant temperature gauge
The coolant temperature gauge is in the
instrument cluster on the right-hand side.
The reading may rise up to 120 † below nor-
mal driving conditions if the coolant has been filled correctly.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
! Do not drive in the overrevving range.
Doing so will damage the engine.
The red band in the rev counter indicates the
engine's overrevving range. 208
Displays and operationOn-board computer and displays

The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay special attention to road con- ditions when temperatures are around the
freezing point.
The outside temperature display is in the mul-
tifunction display.
Changes in the outside temperature are dis-
played after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 168):
The segments light up from the stored
speed to the maximum speed.
R Variable SPEEDTRONIC activated
(Y page 171):
The segments light up from the start of the scale to the selected limit speed.
R DISTRONIC PLUS activated (Y page 173):
One or two segments in the set speed
range light up.
R DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the
vehicle in front and the stored speed light
up. Operating the on-board computer
Overview :
Multifunction display
; Switches on LINGUATRONIC; see the sep-
arate operating instructions
= Right control panel
? Left control panel
A Back button
X To activate the on-board computer: turn
the key to position 1in the ignition lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel. Displays and operation
209On-board computer and displays Z

Left control panel
=
; R
Calls up the menu and menu bar 9
: Press briefly:
R Scrolls through lists
R Selects a submenu or function
R In the Audio Audio menu: selects a
stored station, an audio track or
a video scene
R In the Tel
Tel (telephone) menu:
switches to the phone book and
selects a name or telephone
number 9
: Press and hold:
R In the Audio Audio menu: selects the
previous/next station or selects
an audio track or a video scene
using rapid scrolling
R In the Tel
Tel (Telephone) menu,
starts rapid scrolling through the
phone book a R
Confirms selection/display mes-
sage
R In the Tel Tel(telephone) menu:
switches to the telephone book
and starts dialling the selected
number
R In the Audio Audio menu: stops the
station search function at the
desired station Right control panel
~ R
Rejects or ends a call
R Exits telephone book/redial
memory 6 R
Makes or accepts a call
R Switches to the redial memory W
X R
Adjusts the volume 8 R
Mute Back button
% Press briefly:
R Back
R Switches off LINGUATRONIC;
see the separate operating
instructions
R Hides display messages/calls
up the last Trip
Trip menu function
used
R Exits the telephone book/redial
memory % Press and hold:
R Calls up the standard display in
the Trip Trip menu Multifunction display
Multifunction display (example: vehicles with auto-
matic transmission)
: Permanent display: outside temperature
or speed (Y page 220)
; Time
= Text field 210
Displays and operationOn-board computer and displays

?
Menu bar
A Drive program (Y page 152)
B Transmission position (Y page 152)
X To show the menu bar ?:press the =
or ; button on the steering wheel.
Menu bar ?disappears after a few seconds.
Text field =shows the selected menu or
submenu as well as display messages.
i You can set the time using the audio sys-
tem or COMAND Online; see the separate
operating instructions.
The following messages may appear in the
multifunction display:
Z Gearshift recommendation, for
manual transmission
(Ypage 151) or automatic trans-
mission (Y page 156)
XjY Active Parking Assist
(Ypage 186)
¯ Cruise control (Y page 168)
È SPEEDTRONIC (Y page 171)
_ Adaptive Highbeam Assist
(Ypage 109)
¤ ECO start/stop function
(Ypage 146)
ë HOLD function (Y page 179)
120 km/h!
120 km/h! Maximum permissible speed
exceeded (only for certain coun-
tries) Menus and submenus
Menu overview
Operating the on-board computer
(Y page 209).
Depending on the equipment fitted in the
vehicle, you can call up the following menus:
R Trip Trip menu (Y page 211)
R Navi
Navi menu (navigation instructions)
(Y page 213)
R Audio
Audio menu (Y page 214) R
Tel
Tel (telephone) menu (Y page 215)
R Assist
Assist (Assistance) menu (Y page 217)
R Serv.
Serv. menu (Y page 219)
R Settings
Settings menu (Ypage 220)
R AMG
AMG menu in AMG vehicles (Y page 226)
The Audio
Audio, Navi
NaviandTel
Tel menus differ slightly
in vehicles with Audio 5, Audio 20 and in vehi-
cles with COMAND Online. The examples
given in this Owner's Manual apply to vehicles equipped with COMAND Online. Trip menu
Standard display X
Press and hold the %button on the
steering wheel until the Trip Tripmenu with
trip meter :and total distance
recorder ;is shown.
Trip computer "From start" or "From
reset" Example: "From start" trip computer
:
Distance
; Time
= Average speed
? Average fuel consumption
X Press the =or; button on the steer-
ing wheel to select the Trip Tripmenu.
X Press the 9or: button to select
From start
From start orFrom reset
From reset. Menus and submenus
211On-board computer and displays Z

The values in the
From start
From startsubmenu are
calculated from the start of a journey, whilst
the values in the From reset
From reset submenu are
calculated from the last time the submenu
was reset (Y page 212).
The From start
From start trip computer is automati-
cally reset when:
R the ignition has been switched off for more
than four hours.
R 999 hours have been exceeded.
R 9,999 kilometres have been exceeded.
The From reset
From reset trip computer is automati-
cally reset if the value exceeds 9,999 hours or 99,999 kilometres.
ECO display Example: ECO display
X Press the =or; button on the steer-
ing wheel to select the Trip Tripmenu.
X Press the 9or: button to select
ECO DISPLAY
ECO DISPLAY.
If the ignition remains switched off for longer
than four hours, the ECO display will be auto- matically reset.
For further information on the ECO display,
see (Y page 165).
Displaying the range and current fuel
consumption X
Press the =or; button on the steer-
ing wheel to select the Trip Tripmenu.
X Press the 9or: button to select
current fuel consumption ;(not for AMG
vehicles) and approximate range :.
The approximate range that can be covered is
calculated according to your current driving
style and the amount of fuel in the tank. If
there is only a small amount of fuel left in the
fuel tank, the display shows a vehicle being
refuelled Cinstead of the range.
Digital speedometer :
Gearshift recommendation, manual trans-
mission (Y page 151) or automatic trans-
mission (Y page 156)
; Digital speedometer
Gearshift recommendation :is not given on
AMG vehicles.
X Press the =or; button on the steer-
ing wheel to select the Trip Tripmenu.
X Press the 9or: button to select the
digital speedometer.
Resetting values Example: resetting the "From start" trip computer
You can reset the values of the following func-
tions:
R trip meter
R "From start" trip computer 212
Menus and submenusOn-board computer and displays

R
"From reset" trip computer
R ECO display
X Press the =or; button on the steer-
ing wheel to select the Trip
Tripmenu.
X Press the 9or: button to select the
function that you wish to reset.
X Press the abutton.
X Press the :button to select Yes
Yesand
press ato confirm.
i If you reset the values in the ECO display,
the values in the "From start" trip computer
are also reset. If you reset the values in the "From start" trip computer, the values in
the ECO display are also reset. Navigation menu
Displaying navigation instructions X
Switch on the audio system or COMAND
Online; see the separate operating instruc-
tions.
X Press the =or; button on the steer-
ing wheel to select the Navi
Navi menu.
In the Navi
Navi menu, the multifunction display
shows navigation instructions. For more
information, see the separate operating
instructions.
Route guidance not active :
Direction of travel
; Current road Activating route guidance No change of direction announced
:
Distance to the destination
; Distance to the next change of direction
= Current road
? Symbol indicating "follow the road's
course"
Change of direction announced without a lane recommendation :
Road to which the change of direction
leads
; Distance to change of direction and visual
distance display
= Change-of-direction symbol
When a change of direction is announced, you
will see symbol =for the change of direction
and distance graphic ;. This shortens
towards the top of the display as you
approach the point of the announced change
of direction. Menus and submenus
213On-board computer and displays Z