2012 MERCEDES-BENZ A CLASS engine

Speed Limit Assist
Displaying Speed Limit Assist
X
Press the = or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
Speed Limit Assist.
X Press the a button.
Under certain conditions, detected speed
limits are shown in the multifunction dis-
play

(Y page 196).
Activating/deactivating the Speed Limit
Assist message function
X Press the =
or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
Speed Limit Assist.
X Press the a button.
The multifunction display shows Speed
Limit Assist.
X Press the : button.
The current selection is displayed.
X To activate or deactivate: press a.
If
the Speed Limit Assist message function
is activated, a detected speed limit is auto-
matically displayed for five seconds. Other
items in the multifunction display are not
shown during this time.
When Speed Limit Assist is operational and
the message function is activated, the
assistance graphic shows the Ä sym-
bol.
Deactivating/activating ESP ®i
Observe
the "Important safety notes" sec-
tion in the description of ESP ( Y page 65).G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only

deactivate ESP ®
in the situations descri-
bed in the following. It may be best to deactivate ESP
®
in the fol-
lowing situations:
R when using snow chains
R in deep snow
R on sand or gravel
Deactivating/activating ESP ®
on AMG vehi-
cles ( Y page 66).
For further information about ESP ®
, see
(Y page 65).
X Start the engine.
X Press the =
or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
ESP.
X Press the a button.
X To activate/deactivate: press the a
button again.
ESP ®
is deactivated if the å warning
lamp in the instrument cluster lights up
continuously when the engine is running.
If the ÷
warning lamp and the å warn-
ing lamp are lit continuously, ESP ®
is not
available due to a malfunction.
Observe the information on warning lamps
(Y page 260).
Observe the information on display messages
(Y page 230).
Activating/deactivating the distance
warning function X
Press the =
or ; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9 or : button to select
Distance warning.
X Press the a button.
The current selection is displayed.
X To activate/deactivate: press the a
button again.
When the distance warning function is
deactivated, the æ symbol appears in
the multifunction display in the assistance
graphics display. 218
Menus and submenus
On-board computer and displays

X
Press the : or 9 button to select the
Permanent display: function.
You will see the selected setting: outside
temperature or Dig. speedo [mph].
X Press the a button to save the setting.
i The speed is displayed in mph.
Lights Switching the daytime driving lights on/
off
The
Daytime driving lights function can
only be switched on with the engine turned
off.
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Lights submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Daytime driving lights function.
If the Daytime driving lights function
has been switched on, the cone of light and
the W symbol in the multifunction dis-
play are shown in orange.
X Press the a button to save the setting.
Further information on daytime driving lights
(Y page 105).
Switching the Intelligent Light System
on/off
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Lights submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Intell. Light System function.
If the Intell. Light Sys. function has
been switched on, the cone of light and the
L symbol in the multifunction display
are shown in orange.
X Press the a button to save the setting. If you activate the Intell. Light System
function,

you activate the following functions:
R motorway mode
R active light function
R cornering light function
R extended range foglamps
If you set the dipped-beam headlamps for
driving on the right/left, the multifunction
display shows the Intell. Light System:
system inoperative Inactive for
left-side traffic or Intell. Light
System: System inoperative Inactive
for right-side traffic display message
instead of the Intell. Light Sys. function
in the Lights submenu ( Y page 221).
Further information on the Intelligent Light
System (Y page 108).
Setting the dipped-beam headlamps for
driving on the left/right
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Lights submenu.
X Press a to confirm.
X Press : or 9 to select the Dipped
beams Setting for: function.
You will see the selected setting: Right-
side traffic or Left-side traffic.
X Press the a button to save the setting.
If you change the setting, conversion does
not take place until the next time the vehi-
cle is stationary.
This function is only available on vehicles with
the Intelligent Light System.
You can use this function to switch between
symmetrical and asymmetrical dipped beam
(Y page 104).
If you set the dipped-beam headlamps for
driving on the right/left, then motorway
mode and the extended range foglamps are
unavailable.
You can also have the dipped-beam head-
lamps set for driving on the right/left at a Menus and submenus
221
On-board computer and displays Z

qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
Switching Adaptive Highbeam Assist on/
off
This
function is only available on vehicles with
the Intelligent Light System.
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Lights submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Adapt. main beam function.
If the Adapt. main beam function has
been switched on, the cone of light and the
_ symbol in the multifunction display
are shown in orange.
X Press the a button to save the setting.
For further information about Adaptive High-
beam Assist, see ( Y page 110).
Setting the brightness of the ambient
lighting
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Lights submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Amb. light +/- function.
You will see the selected setting.
X Press a to confirm.
X Press the :
or 9 button to adjust the
brightness to any level from Off toLevel
5 (bright).
X Press the a or %
button to save the
setting.
Activating/deactivating the surround
lighting and exterior lighting delayed
switch-off
If you have activated the Surround light‐
ing function and the light switch is set to Ã, the following functions are activated
when it is dark:
R
surround lighting: the exterior lighting
remains lit for 40 seconds after unlocking
with the key. If you start the engine, the
surround lighting is switched off and auto-
matic headlamp mode is activated
(Y page 105).
R exterior lighting delayed switch-off: the
exterior lighting remains lit for
60

seconds after the engine is switched off.
If you close all the doors and the tailgate,
the exterior lighting goes off after
15 seconds.
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Lights submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Surround lighting function.
When the Surround lighting function is
activated, the light cone and the area
around the vehicle are displayed in orange
in the multifunction display.
X Press the a button to save the setting.
Deactivating delayed switch-off of the exte-
rior lighting temporarily:
X Before leaving the vehicle, turn the key to
position 0 in the ignition lock.
X Turn the key to position 2 in the ignition
lock.
The exterior lighting delayed switch-off is
deactivated.
Delayed switch-off of the exterior lighting is
reactivated the next time you start the
engine.
i Depending on your vehicle's equipment,
when the surround lighting and delayed
switch-off exterior lighting are on, the fol-
lowing light up:
R side lamps
R foglamps222
Menus and submenus
On-board computer and displays

AMG menu in AMG vehicles
AMG displays :
Digital speedometer
; Gear indicator
= Upshift indicator
? Engine oil temperature
A Coolant temperature
B Transmission fluid temperature
X Press the = or ; button on the steer-
ing wheel to select the AMG menu.
Upshift indicator UP= indicates that the
engine has reached the overrevving range
when in the manual gearshift program.
Upshift indicator UP= fades out other mes-
sages until you have shifted up.
If the engine oil temperature is below

80 †,
oil temperature ? is shown in blue. Avoid
using the full output of the engine during this
time.
If the transmission fluid temperature is below
50 †, oil temperature B is shown in blue.
Avoid using the full output of the engine dur-
ing this time.
SETUP :
Drive program (C/S/M)
; ESP ®
mode ( ON/OFF) or SPORT handling
mode ( SPORT) SETUP shows the drive program, the ESP
®
(Electronic Stability Program) mode and the
SPORT handling mode.
X Press the =
or ; button on the steer-
ing wheel to select the AMG menu.
X Press the 9 button repeatedly until
SETUP is displayed.
RACETIMER Displaying and starting the RACETIMER
The

RACETIMER is only intended for use on a
closed race circuit. Do not use the function
on public roads. :
Lap
; RACETIMER
You can start the RACETIMER when the
engine is running or if the key is in position
2 in the ignition lock.
X Press the =
or ; button on the steer-
ing wheel to select the AMG menu.
X Press the 9 button repeatedly until the
RACETIMER is shown.
X To start:
press the a button to start the
RACETIMER.
Displaying the intermediate time 226
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 Possible causes/consequences and
M SolutionsThe yellow
! warning lamp lights up. If you manually apply or
release the electric parking brake, the red ! indicator lamp
flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.
X Vehicles with manual transmission: engage first gear.
X Vehicles with automatic transmission: shift the transmission
to P.
X Visit a qualified specialist workshop. !
Parking

brake inop‐
erative The yellow
! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.
X Rectify the cause of the overvoltage or undervoltage, e.g. by
charging the battery or restarting the engine.
X Apply or release the electric parking brake.
If it remains impossible to apply or release the electric parking
brake:
X Switch off the ignition and turn it back on.
X Apply or release the electric parking brake.
If the electric parking brake still cannot be released:
X Consult a qualified specialist workshop. The display message is only shown while the vehicle is in motion.
The

red ! indicator lamp flashes and the yellow ! warning
lamp is lit.
It is not possible to apply the electric parking brake manually.
X Vehicles with manual transmission: engage first gear.
X Vehicles with automatic transmission:
shift the transmission
to P.
X Visit a qualified specialist workshop. !
Turn on the igni‐
tion to release
the parking brake The red
! indicator lamp lights up.
You
attempted to release the electric parking brake while the igni-
tion was switched off.
X Turn the key to position 1 in the ignition lock. Display messages
235
On-board computer and displays Z

Display messages Possible causes/consequences and
M SolutionsJ
Brake immediately Vehicles with manual transmission: a malfunction has occurred
while the HOLD function was activated.
A
tone may also sound at regular intervals. If you attempt to lock
the vehicle, the tone becomes louder.
You cannot start the engine.
X Paying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message disap-
pears.
X Secure the vehicle against rolling away ( Y page 162).
You can restart the engine. J
Check brake fluid
level There is insufficient brake fluid in the brake fluid reservoir.
In

addition, the red J warning lamp lights up in the instrument
cluster and a warning tone sounds.
G WARNING
The braking efficiency may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention

to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away ( Y page 162).
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the fault. #
Check brake pad
wear The brake pads/linings have reached their wear limit.
X
Visit a qualified specialist workshop. PRE-SAFE
inoperative See
Owner's Manual
Important functions of PRE-SAFE
®

have failed. All other occupant
safety systems, e.g. airbags, remain available.
X Visit a qualified specialist workshop immediately.236
Display messages
On-board computer and displays

Display messages Possible causes/consequences and
M SolutionsPRE-SAFE
Functions cur‐
rently
limited See
Owner's Manual Adaptive Brake Assist is temporarily inoperative. Possible causes:
R
the radar sensor cover in the radiator trim is dirty.
R the function is impaired due to heavy rain or snow.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R AMG vehicles: ESP ®
is deactivated.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Once
the causes listed above no longer apply, the display message
goes out.
Adaptive Brake 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 radar sensor cover in the radiator grille
(Y page 294).
X Restart the engine.
X AMG vehicles: reactivate ESP ®
(Y page 66). PRE-SAFE
Functions limited
See Owner's Manual Adaptive Brake Assist is faulty. The distance warning signal may
also have failed.
X
Visit a qualified specialist workshop. ü If the symbol appears in the multifunction display, a seat belt
tongue has been inserted into a rear seat belt buckle.
Further

information on the status indicator for the rear seat belts
(Y page 49). ý If the symbol appears in the multifunction display, a seat belt
tongue has not been inserted in a rear seat belt buckle.
G WARNING
A seat belt which is not worn correctly, or which has not been
engaged in the seat belt buckle correctly, cannot provide the
intended level of protection.
This poses an increased risk of injury.
X If necessary, ask the occupants in the rear to fasten their seat
belts ( Y page 47).
Further information on the status indicator for the rear seat belts
(Y page 49). Display messages
237
On-board computer and displays Z