2012 MERCEDES-BENZ A CLASS steering

:
Lane Keeping Assist camera
If you select km on the on-board computer in
the Display unit Speed-/odometer func-
tion (Y page 220), Lane Keeping Assist is
active starting at a speed of 60 km/h
. If the
miles display unit is selected, the assistance
range begins at 40 mph.
Important safety notes G
WARNING
Lane Keeping Assist cannot always clearly
identify lane markings.
In these cases, Lane Keeping Assist may:
R give an unnecessary warning
R not give a warning
There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep in lane, especially if Lane
Keeping Assist alerts you. G
WARNING
The Lane Keeping Assist warning does not
return the vehicle to the original lane. There
is a risk of an accident.
Always steer, apply the brakes or accelerate
the vehicle yourself, especially if Lane Keep-
ing Assist alerts you.
If you fail to adapt your driving style, Lane
Keeping

Assist can neither reduce the risk of
an accident nor override the laws of physics.
Lane Keeping Assist cannot take into account
road, weather or traffic conditions. Lane
Keeping Assist is only an aid. You are respon-
sible for the distance to the vehicle in front, for vehicle speed, for braking in good time,
and for staying in the lane.
Lane

Keeping Assist does not keep your vehi-
cle in its lane.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflection from other vehicles
(e.g. if the road surface is wet)
R the windscreen is dirty, misted up, dam-
aged or covered, for instance by a sticker
in the vicinity of the camera
R no, or several, unclear lane markings are
present for one lane, e.g. in a construction
area
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are highly variable shade conditions
on the road
A warning may be given if a front wheel
passes over a lane marking. It will warn you
by means of intermittent vibration in the
steering wheel for up to 1.5 seconds.
Activating Lane Keeping Assist
X Activate Lane Keeping Assist using the on-
board computer; to do so, select Stand‐
ard or Adaptive(Y page 219).
If you drive at speeds above

60 km/h and
lane markings are detected, the lane mark-
ings in the assistance graphics display
(Y page 217) are shown in green. 200
Driving systems
Driving and parking

trailer combination could also become unsta-
ble.
To avoid hazardous situations:
R
make
sure to check the noseweight before
each journey.
R use a drawbar noseweight as close as pos-
sible to the maximum noseweight.
R do not exceed the maximum permissible
noseweight.
R do not use a noseweight lower than the
minimum permissible trailer drawbar nose-
weight.
When reversing the vehicle towards the
trailer, make sure there is nobody between
the trailer and the vehicle.
Couple and uncouple the trailer carefully. If
you do not couple the trailer to the towing
vehicle correctly, the trailer could become
detached.
Make sure that the following values are not
exceeded:
R the permissible trailer drawbar noseweight
R the permissible trailer load
R the permissible rear axle load of the towing
vehicle
R the maximum permissible gross vehicle
weight of both the towing vehicle and the
trailer
The applicable permissible values, which
must not be exceeded, can be found:
R in your vehicle documents
R on the identification plates of the trailer tow
hitch and the trailer
R on the vehicle identification plate
If the values differ, the lowest value applies.
You will find the values approved by the man-
ufacturer on the vehicle identification plates
and those for the towing vehicle under "Tech-
nical data" ( Y page 349).
When towing a trailer, your vehicle's handling
characteristics will be different in comparison
to when driving without a trailer. The vehicle/trailer combination:
R
is heavier
R is restricted in its acceleration and gradi-
ent-climbing capability
R has an increased braking distance
R is affected more by strong crosswinds
R demands more sensitive steering
R has a larger turning circle
This can impair the vehicle's handling char-
acteristics.
Adapt your style of driving accord-
ingly. Maintain a safe distance. Drive care-
fully.
When towing a trailer, always adjust your
speed to the current road and weather con-
ditions. Do not exceed the maximum permis-
sible speed for your vehicle/trailer combina-
tion.
General notes X
When towing a trailer, set the tyre pressure
on the rear axle of the towing vehicle for a
maximum

load; see the tyre pressure table
in the fuel filler flap ( Y page 321).
Please note that when towing a trailer, PARK-
TRONIC ( Y page 182) and Blind Spot Assist
(Y

page 197) availability is limited or not avail-
able at all.
i The height of the ball coupling changes
with the load of the vehicle. If necessary,
use a trailer with a height-adjustable draw-
bar.
You will find fitting dimensions and loads
under "Technical data" ( Y page 348).
Driving tips i
Observe the notes on ESP ®
trailer stabi-
lisation ( Y page 68).
The

maximum permissible speed for vehicle/
trailer combinations depends on the type of
trailer. Before beginning the journey, check
the trailer's documents to see what the max-
imum permitted speed is. Observe the legally 202
Towing a trailer
Driving and parking

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 1 in 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
209
On-board computer and displays Z

?
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
(Y

page 151) or automatic trans-
mission ( Y page 156)
XjY Active Parking Assist
(Y page 186)
¯ Cruise control ( Y page 168)
È SPEEDTRONIC ( Y page 171)
_ Adaptive Highbeam Assist
(Y page 110)
¤ ECO start/stop function
(Y page 146)
ë HOLD function ( Y page 179)
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 menu (Y page 211)
R Navi menu (navigation instructions)
(Y page 213)
R Audio menu (Y page 214) R
Tel (telephone) menu ( Y page 215)
R Assist (Assistance) menu (Y page 217)
R Serv. menu (Y page 219)
R Settings menu (Y page 220)
R AMG menu in AMG vehicles ( Y page 226)
The Audio, Navi

and 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 menu 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 Menus and submenus
211
On-board computer and displays Z

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.
When telephoning, you must observe the
legal requirements for the country in which
you are currently driving.
X Switch on your mobile phone and audio
system or COMAND Online, see the sepa-
rate operating instructions.
X Place a mobile phone in the mobile phone
bracket ( Y page 279), or establish a Blue-
tooth ®
connection with the audio system
or

COMAND Online (see the separate oper-
ating instructions).
X Press the =
or ; button on the steer-
ing wheel to select the Tel menu.
You will see one of the following display mes-
sages in the multifunction display:
R Please

enter PIN: the mobile phone has
been placed in the mobile phone bracket
and the PIN has not been entered.
When you enter your PIN via the mobile
phone, LINGUATRONIC, the audio system
or COMAND Online, the mobile phone
searches for a network.
R Telephone ready or the name of the net-
work provider: the mobile phone has found
a network and is ready to receive.
R Telephone No service: there is no net-
work available or the mobile phone is
searching for a network.
i You can obtain further information about
suitable mobile phones and connecting
mobile phones via Bluetooth ®
:
R from any Mercedes Benz Service Centre
R on the Internet at: http://
www.mercedes-benz.com/connect Accepting a call
Example: incoming call
X
Press the 6 button on the steering
wheel to accept an incoming call.
If someone calls you when you are in the
Tel menu, a display message appears in the
multifunction display.
If you are not in the Tel menu, you can still
accept a call.
Rejecting or ending a call X
Press the ~ button on the steering
wheel.
If you are not in the Tel menu, you can still
reject or end a call.
Dialling a number from the phone book X
Press the =
or ; button on the steer-
ing wheel to select the Tel menu.
X Press the 9, : or a button to
switch to the phone book.
X Press the 9
or : button to select the
desired name.
To start scrolling rapidly, press and hold the
9 or : button for longer than one
second.
Rapid scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored
for

a name: press the 6 or a button
to start dialling.
or
X If there is more than one number for a
particular name: press the 6 or a
button to display the numbers. 216
Menus and submenus
On-board computer and displays

X
Press the = or ; button to select
Interm. Time.
X Press a to confirm.
The intermediate time is displayed for five
seconds.
Starting a new lap :
RACETIMER
; Fastest lap time (best lap)
= Lap
X Press a to confirm New Lap.
i A maximum of 16 laps may be stored. The
16th lap can only be completed with Fin‐
ish Lap.
Stopping the RACETIMER X
Press the % button on the steering
wheel.
X Confirm Yes with a.
The RACETIMER interrupts timing if you stop
the vehicle and turn the key to position 1 in
the

ignition lock. If you turn the key to position
2 or 3 and then press a to confirm
Start, timing is continued.
Resetting the current lap
X Stop the RACETIMER.
X Press the = or ; button to select
Reset Lap.
X Press a to reset the lap time to "0". Deleting all laps
If you switch off the engine, the RACETIMER
is reset to "0" after 30 seconds. All laps are
deleted.
You cannot delete individual stored laps. If
you have stopped 16 laps, the current lap
does not have to be reset.
X
Reset the current lap.
X Press a to confirm Reset.
Reset Race-Timer? appears in the multi-
function display.
X Press the : button to select Yes and
press the a button to confirm.
All laps are deleted.
Overall evaluation :
RACETIMER overall evaluation
; Total time driven
= Average speed
? Distance covered
A Maximum speed
This function is shown if you have stored at
least one lap and stopped the RACETIMER.
X Press the =
or ; button on the steer-
ing wheel to select the AMG menu.
X Press the 9 button repeatedly until the
overall evaluation is shown. Menus and submenus
227
On-board computer and displays Z

Display messages
General notes
Display messages appear in the multifunction display.
Display messages with graphic symbols are simplified in the Owner's Manual and may differ
from the symbols in the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in
this Owner's Manual.
Certain
display messages are accompanied by an audible warning tone or a continuous tone.
When the ignition is switched off, all display messages are deleted apart from some high-
priority display messages. Once the causes of the high-priority display messages have been
rectified, the corresponding display messages are also deleted.
When you stop and park the vehicle, please observe the notes on the HOLD function
(Y page 179) and parking ( Y page 162).Hiding display messages
X Press the a or % button on the steering wheel to hide the display message.
The display message is cleared.
The multifunction display shows high-priority display messages in red. Some high-priority dis-
play messages cannot be hidden.
The multifunction display shows these messages continuously until the causes for the mes-
sages have been remedied. Message memory
The on-board computer saves certain display messages in the message memory. You can
call up the display messages:
X Press = or ; on the steering wheel to select the Service menu.
If there are display messages, the multifunction display shows, for example, 2 messages.
X Press the 9 or : button to select the entry, e.g. 2 messages.
X Press a to confirm.
X Press the 9 or : button to scroll through the display messages. Display messages
229
On-board computer and displays Z

Display messages Possible causes/consequences and
M SolutionsVehicles with Becker
®
MAP PILOT: if the Becker ®
MAP PILOT is
not connected, the radar sensor system is deactivated automati-
cally.
Blind Spot Assist is not available.
X Connect the Becker ®
MAP PILOT; see the separate operating
instructions. Lane Keeping
Assist currently
unavailable See
Owner's Manual Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes:
R
the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
R there are no lane markings for a longer period.
R the
lane markings are worn, dark or covered, e.g. by dirt or snow.
Once the causes listed above no longer apply, the display message
goes out.
Lane Keeping Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 162).
X Clean the windscreen. Lane Keeping
Assist inoperative Lane Keeping Assist is faulty.
X
Visit a qualified specialist workshop. Blind Spot Assist
currently unavail‐
able See Owner's
Manual Blind Spot Assist is temporarily inoperative.
You

have established the electrical connection between the trailer
and your vehicle.
X Press a on the steering wheel to confirm the display mes-
sage.
Blind Spot Assist is deactivated while towing a trailer. Display messages
247
On-board computer and displays Z