2012 MERCEDES-BENZ A CLASS door lock

The electric parking brake secures the vehicle
automatically if the HOLD function is activa-
ted and:
R
the driver's door is open and the driver's
seat belt is unfastened
R the
engine is switched off, unless it is auto-
matically switched off by the ECO start/
stop function
R a system fault occurs
R the power supply is not sufficient
Vehicles with automatic transmission
If a fault occurs, then the transmission may
also be shifted into position P automatically.
Vehicles with manual transmission
The Brake immediately message can also
appear in the multifunction display.
X Immediately depress the brake pedal firmly
until

the warning message in the multifunc-
tion display goes out.
The HOLD function is deactivated.
A horn will sound at regular intervals if you
turn off the engine, take off your seat belt or
open the driver's door when the HOLD func-
tion is activated. The horn alerts you to the
fact that the HOLD function is still activated.
If you attempt to lock the vehicle, the tone
becomes louder. The vehicle cannot be
locked until you have deactivated the HOLD
function.
i Once you have switched off the engine,
you cannot restart it until you have deacti-
vated the HOLD function. RACE START
Important safety notes RACE START enables optimum acceleration
from a standing start. The precondition for
this is a suitable high-grip road surface.
Only

activate RACE START on dedicated race
circuits. i
RACE
START is only available in AMG vehi-
cles.
Activation conditions You can activate RACE START if:
R
the doors, the bonnet and the tailgate are
closed
R the

engine is running and the transmission,
traction control and engine are at operating
temperature
R SPORT handling mode is activated
(Y page 66)
R the steering wheel is in the straight-ahead
position.
R the vehicle is stationary and the brake
pedal is depressed (left foot)
R the transmission is in position D.
R drive program M is selected ( Y page 155).
Activating RACE START X
Depress the brake pedal with your left foot
and keep it depressed.
X Pull and hold both steering wheel gearshift
paddles.
X The RACE START Confirm: Paddle UP
Cancel: Paddle DOWN message appears
in the multifunction display.
X Release both steering wheel gearshift pad-
dles.
i If the activation conditions are no longer
fulfilled, RACE START is cancelled. The
RACE START not possible See Own‐
er's

Manual message appears in the mul-
tifunction display.
X To cancel:
pull the left steering wheel shift
paddle (Y page 156).
or
X To confirm: pull the right steering wheel
shift paddle

(Y page 156).
The RACE START available Depress
accelerator message appears in the mul-
tifunction display. Driving systems
181
Driving and parking 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

R
dipped-beam headlamps
R daytime driving lights
R surround lighting in the exterior mirrors
Activating/deactivating
the interior light-
ing delayed switch-off
If you activate the Lighting delayed sw.-
off function, the interior lighting remains on
for 20 seconds after you remove the key from
the ignition lock.
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
Lighting delayed sw.-off function.
If the Lighting delayed sw.-off func-
tion has been switched on, the vehicle inte-
rior is displayed in orange in the multifunc-
tion display.
X Press the a button to save the setting.
Vehicle Setting permanent SPEEDTRONIC
X
Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Vehicle submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Limit speed (winter tyres): function.
You will see the current setting.
X Press a to confirm.
X Press the : or 9 button to adjust
permanent
SPEEDTRONIC in increments of
ten (230 km/h to 160 km/h). The Off set-
ting switches permanent SPEEDTRONIC
off.
X Press the a button to store the entry.
Using the Limit speed (winter tyres)
function, you can set permanent SPEED-
TRONIC ( Y page 172). Switching the automatic locking feature
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
Vehicle submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Automatic door locks function.
When the Automatic door locks func-
tion is activated, the vehicle doors are dis-
played in orange in the multifunction dis-
play.
X Press the a button to save the setting.
If you activate the Automatic door locks
function,
the vehicle is centrally locked above
a speed of around 15 km/h.
For further information on the automatic lock-
ing feature, see ( Y page 81).
Activating/deactivating the acoustic
locking confirmation
If you switch on the Acoustic Lock function,
an acoustic signal sounds when you lock the
vehicle.
X Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Vehicle submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Acoustic Lock function.
If the Acoustic Lock function is activated,
the & symbol in the multifunction dis-
play lights up orange.
X Press the a button to save the setting.
Activating/deactivating the radar sensor
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
Vehicle submenu.
X Press a to confirm. Menus and submenus
223
On-board computer and displays Z

Flammable material such as leaves, grass or
twigs
may ignite if they come into contact with
hot parts of the exhaust system for extended
periods. There is a risk of fire.
When the auxiliary heating is switched on,
make sure that no flammable material can
come into contact with hot vehicle compo-
nents.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for a longer
distance.
i Switch the auxiliary heating on regularly
once a month for about ten minutes.
Comfort Switching belt adjustment 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
Convenience submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Belt adjustment function.
If the Belt adjustment function is activa-
ted, the vehicle seat belt is shown in orange
in the multifunction display.
X Press the a button to save the setting.
For further information on belt adjustment,
see ( Y page 47).
Switching the fold in mirrors when lock-
ing function on/off
This

function is only available on vehicles with
a memory function (Y page 101).
When you activate the Auto. fold-in mir‐
rors function, the exterior mirrors are folded
in when the vehicle is locked.
When you unlock the vehicle and then open a
door, the exterior mirrors fold out again.
If you have switched on the Auto. fold-in
mirrors function and you fold in the exterior mirrors using the button on the door
(Y page 99), they will not fold out automati-
cally. The exterior mirrors can then only be
folded out using the button on the door.
X
Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Convenience submenu.
X Press a to confirm.
X Press the :
or 9 button to select the
Auto. fold-in mirrors function.
If the Auto. fold-in mirrors function is
activated, the vehicle's exterior mirror is
displayed in orange in the multifunction
display.
X Press the a button to save the setting.
Resetting to factory settings X
Press the =
or ; button on the steer-
ing wheel to select the Settings menu.
X Press the :
or 9 button to select the
Factory setting submenu.
X Press a to confirm.
The Reset all settings? message
appears.
X Press the : or 9 button to select
No or Yes.
X Press the a
button to confirm the selec-
tion.
If you have selected Yes , the multifunction
display shows a confirmation message.
For safety reasons, not all functions are reset:
the Limit speed (winter tyres): func-
tion

in permanent SPEEDTRONIC can only be
set in the VEHICLE submenu. If you want to
reset the Daytime driving lights: in the
Light submenu, you must turn the key in the
ignition lock to position 1. Menus and submenus
225
On-board computer and displays Z

Vehicle
Display messages Possible causes/consequences and
M SolutionsTo start engine,
shift to either P
or N You have attempted to start the engine with the transmission in
position R or D.
X
Shift the transmission to position P or N.Auxiliary battery
malfunction The auxiliary battery for the automatic transmission is no longer
being charged.
X
Visit a qualified specialist workshop at the next opportunity.
X Until then, set the automatic transmission to position P before
you switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. Depress brake to
start engine You have attempted to start the engine with the transmission in
position N without depressing the brake pedal.
X
Depress the brake pedal. To shift out of P
or N
depress brake and
start engine You have attempted to shift the transmission to position
R or D
without starting the engine.
X Start the engine.
X Depress the brake pedal.
i It is only possible to shift the transmission from position P to
the desired position if you depress the brake pedal. Only then
can the parking lock be deactivated. If you do not depress the
brake pedal, the DIRECT SELECT lever can still be moved but
the parking lock remains engaged.
i At
transmission fluid temperatures below Ò20 † you can only
shift out of position P into another transmission position when
the engine is running. Apply brake to
deselect Park (P)
position You have attempted to move the transmission selector lever to
position R, N or D without depressing the brake pedal.
X
Depress the brake pedal. Risk of vehicle
rolling
Transmission not
in P The driver's door is open and the transmission is in position
R, N
or D.
A warning tone also sounds.
X Shift the transmission to position P.
X Secure the vehicle against rolling away ( Y page 162).252
Display messages
On-board computer and displays

Display messages Possible causes/consequences and
M SolutionsTrans. oil overhea‐
ted Drive on with
care AMG vehicles: the transmission oil has overheated.
Manual drive program
M and the temporarily active manual drive
program are no longer available. The engine power output is
reduced.
X Allow the vehicle to cool down. 4matic currently
unavailable 4MATIC (permanent all-wheel drive) has overheated. The vehicle
is only driven by the front wheels.
X
Drive on.
The airflow cools 4MATIC more quickly.
When
the display message goes out, 4MATIC is available again
and the vehicle is driven by all four wheels. 4matic inoperative 4MATIC is malfunctioning. The vehicle is only driven by the front
wheels.
X
Visit a qualified specialist workshop. A The tailgate is open.
G WARNING
When the engine is running, exhaust gases can enter the vehicle
interior if the tailgate is open.
There is a risk of poisoning.
X Close the tailgate. ? The bonnet is open.
A warning tone also sounds.
G WARNING
The open bonnet may then block your view when the vehicle is in
motion.
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.
X Apply the electric parking brake.
X Close the bonnet. Active bonnet mal‐
function See Own‐
er's Manual The active bonnet (pedestrian protection) is not active due to a
malfunction or because it has already been triggered.
X
Visit a qualified specialist workshop. C At least one door is open. A warning tone also sounds.
X
Close all doors.254
Display messages
On-board computer and displays

There is a risk of injury, especially when brak-
ing or abruptly changing directions.
R
Always
store objects so that they cannot be
flung around in these or in similar situa-
tions.
R Always make sure that objects do not pro-
trude from stowage compartments, lug-
gage nets or stowage nets.
R Close lockable stowage compartments
while driving.
R Stow and secure objects that are heavy,
hard, pointy, sharp-edged, fragile or too
large in the luggage compartment.
! Only use the cup holders for containers of
the right size and which have lids. The
drinks could otherwise spill.
The stowage compartments in the doors pro-
vide space for bottles:
R front: capacity up to 1.0 l
R rear: capacity up to 0.5 l
Cup holder in the front centre console All vehicles (except vehicles with Audio 5)
Two coin holders
=
and a card holder ; can
be found in the cup holder.
The cup holder and the rubber mat under-
neath can be removed for cleaning. Clean
them with clean, lukewarm water only.
X To remove: Lift the cup holder up and out
with a brief tug :. X
To fit: : insert the cup holder into lateral
curved sections ; in the stowage com-
partment. Simultaneously insert the cup
holder

in such a way that the wedge of the
upper section of the cup holder faces for-
wards.
X :
Press the cup holder downwards until it
engages on the right and left-hand sides.
Vehicles with Audio 5 X
Fold lift-up lid :
in stowage compartment
= up until it engages in the two lugs ;.
You can use front part ? as a cup holder.
Cup holder in the rear seat armrest !
Do
not sit on or support your body weight
on the rear seat armrest when it is folded
down, as you could otherwise damage it.
! Close the cup holder before folding the
rear seat armrest up. Otherwise, the cup
holder could be damaged. 276
Features
Stowing and features

R
One pair of gloves
R Foldable wheel chock Flat tyre
Preparing the vehicle
Your vehicle may be equipped with:
R MOExtended
tyres (tyres with run-flat char-
acteristics) (Y page 300)
Vehicle preparation is not necessary on
vehicles with MOExtended tyres.
R a TIREFIT kit (Y page 299)
R an emergency spare wheel (only for certain
countries)
Information on changing/fitting a wheel
(Y page 325).
X Stop the vehicle as far away as possible
from

traffic on solid, non-slippery and level
ground.
X Switch on the hazard warning lamps.
X Secure the vehicle against rolling away
(Y page 162).
X If possible, bring the front wheels into the
straight-ahead position.
X Switch off the engine.
X Remove the key from the ignition lock.
X All occupants must get out of the vehicle.
Make

sure that they are not endangered as
they do so.
X Make sure that no one is near the danger
area while a wheel is being changed. Any-
one who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
X Get out of the vehicle. Pay attention to traf-
fic conditions when doing so.
X Close the driver's door.
X Place the warning triangle a suitable dis-
tance away

(Y page 298). Observe legal
requirements.
i Vehicles with MOExtended tyres are not
equipped with a TIREFIT kit at the factory.
It

is therefore recommended that you addi- tionally equip your vehicle with a TIREFIT kit
if you fit tyres that do not feature run-flat
characteristics,

e.g. winter tyres. A TIREFIT
kit can be obtained from a qualified spe-
cialist workshop. MOExtended tyres (tyres with run-flat
characteristics)
General notes With MOExtended tyres (tyres with run-flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tyres. The affected
tyre must not show any clearly visible dam-
age.
You can recognise MOExtended tyres by the
MOExtended marking which appears on the
tyre

wall. You will find this marking next to the
tyre size designation, the load-bearing capa-
city and the speed index.
MOExtended tyres may only be used in con-
junction with an active tyre pressure loss
warning system.
If the pressure loss warning message
appears in the multifunction display:
R Observe the instructions in the display
messages ( Y page 251).
R Check the tyre for damage.
R If driving on, observe the following notes.
The maximum driving distance is approx-
imately 80 km when the vehicle is partially
laden and approximately 30 km when the
vehicle is fully laden.
In addition to the vehicle load, the driving dis-
tance possible depends upon:
R speed
R road condition
R outside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving condi-
tions/manoeuvres, or it can be increased
through a moderate style of driving. 300
Flat tyre
Breakdown assistance