snow chains MERCEDES-BENZ A CLASS 2012 Owners Manual

ETS/4ETS (Electronic Traction
System) ...........................................
65
Important safety guidelines .............61
Driving safety systems
ABS (Anti-lock Braking System)
.......61
ADAPTIVE BRAKE ............................. 69
Adaptive brake lamps ...................... 65
BAS (Brake Assist System) ..............62
Overview .......................................... 61
Steering assistant STEER CON-
TROL ................................................ 69
Driving system
Active Parking Assist .....................186
Driving systems
ATTENTION ASSIST ........................ 195
Blind Spot Assist ............................ 197
Cruise control ................................ 168
Display message ............................ 245
Distronic Plus ................................ 173
HOLD function ............................... 179
Lane Keeping Assist ...................... 199
Lane package ................................ 197
PARKTRONIC ................................. 182
RACE START (AMG vehicles) ..........181
Reversing camera ..........................191
Speed Limit Assist ......................... 196
SPEEDTRONIC ............................... 171
Driving tips
Aquaplaning ................................... 167
Automatic transmission ................. 154
Brakes ........................................... 166
DISTRONIC PLUS ........................... 178
Downhill gradient ........................... 166
Driving abroad ............................... 104
Driving in winter ............................. 167
Driving on flooded roads ................167
Driving on wet roads ...................... 167
General .......................................... 165
Icy road surfaces ........................... 168
Limited braking efficiency on sal-
ted roads ....................................... 167
New brake pads/linings ................ 167
Running-in tips ............................... 142
Snow chains .................................. 321
Symmetrical dipped beam .............104
Towing a trailer .............................. 201
Wet road surface ........................... 166
DVD audio (on-board computer) ...... 215 E
EASY-VARIO-PLUS system Luggage compartment enlarge-
ment .............................................. 272
EBD (electronic brake force distri-
bution)
Display message
............................ 232
Function/notes ................................ 69
ECO display
Function/notes ............................. 165
On-board computer ....................... 212
ECO start/stop function
Automatic engine start .................. 147
Automatic engine switch-off ..........146
Deactivating/activating ................. 147
General information ....................... 146
Important safety notes .................. 146
Introduction ................................... 145
Electrical fuses
see Fuses
Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency key
Unlocking the driver's door ..............81
Emergency key element
Function/notes ................................ 75
Locking vehicle ................................ 81
Emergency release
Driver's door .................................... 81
Emergency spare wheel
General notes ................................ 332
Important safety notes .................. 332
Removing ....................................... 332
Technical data ............................... 333
Emergency unlocking
Tailgate ............................................ 83
Vehicle ............................................. 81
Engine
Display message ............................ 243
ECO start/stop function ................ 145
Engine number ............................... 338
Jump-starting ................................. 308
Running irregularly ......................... 149
Starting problems .......................... 149
Starting the engine with the key .... 144
Stopping ........................................ 162 Index
9

S
Safety Children in the vehicle .....................50
Child restraint systems ....................50
Safety system
see Driving safety system

Seat
Adjusting (Performance Seat) ..........97
Folding the backrest (rear com-
partment) forwards/back ..............272
Seat belt
Adjusting the driver's and front-
passenger seat belt .........................47
Adjusting the height ......................... 48
Belt force limiter .............................. 49
Belt tensioner .................................. 49
Cleaning ......................................... 296
Display message ............................ 237
Fastening ......................................... 47
Important safety guidelines .............46
Rear seat belt status indicator ......... 49
Releasing ......................................... 48
Switching belt adjustment on/off
(on-board computer) ...................... 225
Warning lamp ................................. 257
Warning lamp (function) ................... 48
Seats
Adjusting (electrically) .....................94
Adjusting (manually) ........................94
Adjusting the 4-way lumbar sup-
port .................................................. 96
Adjusting the head restraint ............ 94
Cleaning the cover ......................... 296
Correct driver's seat position ........... 92
Important safety notes .................... 93
Seat heating problem ...................... 97
Storing settings (memory function) 101
Switching seat heating on/off ......... 96
Sensors (cleaning instructions) .......294
Service see ASSYST PLUS
Service Centre
see Qualified specialist workshop
Service menu (on-board computer) . 219
Service products Brake fluid ..................................... 344
Coolant (engine) ............................ 344Engine oil .......................................
343
Fuel ................................................ 339
Important safety notes .................. 338
Washer fluid ................................... 345
Service report
see Qualified specialist workshop
Settings
Factory (on-board computer) ......... 225
On-board computer ....................... 220
Setting the air distribution ...............129
Setting the airflow ............................ 129
SETUP (on-board computer) ............. 226
Shifting to neutral (manual trans-
mission) ............................................. 151
Sidebag ................................................ 44
Side lamps Switching on/off ........................... 106
Side windows
Convenience closing ........................ 85
Convenience opening ...................... 85
Important safety notes .................... 83
Opening/closing .............................. 84
Problem (malfunction) .....................86
resetting .......................................... 85
Sliding sunroof
see Panorama sliding sunroof
Snow chains ...................................... 321
Socket Centre console .............................. 279
Luggage compartment ................... 279
Points to observe before use ......... 278
Rear compartment ......................... 279
Specialist workshop ............................ 24
Spectacles compartment .................269
Speed, controlling see Cruise control
Speed Limit Assist
Activating/deactivating the warn-
ing function .................................... 218
Displaying ...................................... 218
Display message ............................ 246
Display message in the multifunc-
tion display .................................... 197
Function/notes ............................. 196
Important safety notes .................. 19616
Index

Windscreen washer fluid
see Windscreen washer system
Windscreen washer system
Notes ............................................. 345
Topping up
..................................... 289
Windscreen wipers
Display message ............................ 256
Problem (malfunction) ...................120
Rear window wiper ........................118
Replacing the wiper blades ............ 118
Switching on/off ........................... 117
see Windscreen
Winter driving
General notes ................................ 320
Winter operation
Slippery road surfaces ................... 168
Snow chains .................................. 321
Winter tyres
Limiting the speed (on-board com-
puter) ............................................. 223
M+S tyres ...................................... 320
Wiper blades
Cleaning ......................................... 293
Important safety notes .................. 118
Replacing (on the rear window) ..... 119
Replacing (windscreen) ..................118
Wooden trim (cleaning instructions) 295
Workshop see Qualified specialist workshop Z
ZONE function Switching on/off

........................... 12920
Index

opened from inside the vehicle. When the
vehicle is unlocked, the door can be opened
from the outside.
X
To activate: press the child-proof lock
lever up in the direction of arrow :.
X Make sure that the child-proof locks are
working properly.
X To deactivate: press the child-proof lock
lever down in the direction of arrow ;.
Override feature for the rear side win-
dows X
To activate/deactivate: press button :.
If indicator lamp is lit, operation of the rear
side windows is disabled. Operation is only
possible using the switches in the driver's
door. If the indicator lamp is off, operation
is possible using the switches in the rear
compartment. Driving safety systems
Driving safety systems overview
In
this section, you will find information about
the following driving safety systems:
R ABS ( Anti-lock Braking System)
(Y page 61)
R BAS ( Brake Assist System) ( Y page 62)
R COLLISION PREVENTION ASSIST (adaptive
Brake Assist and distance warning func-
tion) (Y page 62)
R Adaptive brake lamps ( Y page 65)R
ESP ®
(Electronic Stability Program)
(Y page 65)
R EBD ( electronic brake force distribution)
(Y page 69)
R ADAPTIVE BRAKE

(Y page 69)
R STEER CONTROL ( Y page 69) Important safety notes
If you fail to adapt your driving style or if you
are

inattentive, the driving safety systems can
neither reduce the risk of accident nor over-
ride the laws of physics. Driving safety sys-
tems are merely aids designed to assist driv-
ing. You are responsible for the distance to
the vehicle in front, for vehicle speed and for
braking in good time. Always adapt your driv-
ing style to suit the prevailing road, weather
and traffic conditions and maintain a safe dis-
tance from the vehicle in front. Drive care-
fully.
i The driving safety systems described only
work as effectively as possible when there
is adequate contact between the tyres and
the road surface. Pay particular attention
to the information regarding tyres, recom-
mended minimum tyre tread depths etc. in
the "Wheels and tyres" section
(Y page 318).
In wintry driving conditions, always use
winter tyres (M+S tyres) and, if necessary,
snow chains. Only in this way will the driv-
ing safety systems described in this section
work as effectively as possible. ABS (Anti-lock Braking System)
Important safety notes i
Observe
the "Important safety notes" sec-
tion for driving safety systems
(Y page 61). G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac- Driving safety systems
61
Safety
Z

ESP
®
is deactivated if the å ESP®
OFF
warning lamp in the instrument cluster lights
up continuously when the engine is running.
If the ÷ ESP ®
warning lamp and the
å ESP ®
OFF warning lamp are lit contin-
uously, ESP ®
is not available due to a mal-
function.
Observe the information on warning lamps
(Y page 260) and display messages which
may be shown in the instrument cluster
(Y page 230).
i Only use wheels with the recommended
tyre sizes. Only then will ESP ®
function
properly.
Characteristics of ESP ®General notes
If

the ÷ ESP warning lamp goes out before
beginning the journey, ESP ®
is automatically
active.
If ESP ®
intervenes, the ÷ ESP®
warning
lamp flashes in the instrument cluster.
If ESP ®
intervenes:
X Do not deactivate ESP ®
under any circum-
stances.
X When pulling away, only depress the accel-
erator pedal as far as is necessary.
X Adapt your driving style to suit the prevail-
ing road and weather conditions.
ECO start/stop function
The ECO start/stop function switches the
engine off automatically if the vehicle stops
moving.

When pulling away again, the engine
starts automatically. ESP ®
remains in its pre-
viously selected status. Example: if ESP®
was deactivated before the engine was
switched off, ESP ®
remains deactivated when
the engine is switched on again.
The ECO start/stop function switches the
engine off automatically if the vehicle stops
moving. When pulling away again, the engine
starts automatically. ESP ®
remains in its pre- viously selected status.
Example: if ESP®
was deactivated before the engine was
switched

off, ESP®
remains deactivated when
the engine is switched on again.
Deactivating/activating ESP ®
(AMG
vehicles) Important safety notes
i
Observe

the "Important safety notes" sec-
tion (Y page 61).
You can select between the following states
of ESP ®
:
R ESP ®
is activated.
R SPORT handling mode is activated.
R ESP ®
is deactivated. G
WARNING
When SPORT handling mode is activated,
there is a greater risk of skidding and acci-
dents.
Only

activate SPORT handling mode in the sit-
uations described in the following. 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.
In the following situations, it may be better to
activate SPORT handling mode or deactivate
ESP ®
:
R when using snow chains
R in deep snow
R on sand or gravel
R on specially designated roads when the
vehicle's own oversteering and understeer-
ing characteristics are desired
Driving in SPORT handling mode or without
ESP ®
requires an extremely qualified and
experienced driver. 66
Driving safety systems
Safety

Deactivating/activating ESP
®
(except
AMG vehicles) Important safety notes
You can select between the following states
of ESP
®
:
R ESP ®
is activated.
R ESP ®
is deactivated. 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
i Activate ESP ®
as soon as the situations
described above no longer apply. ESP ®
will
otherwise not be able to stabilise the vehi-
cle if the vehicle starts to skid or a wheel
starts to spin.
Deactivating/activating ESP ®
You can deactivate or activate ESP ®
via the
on-board computer.
X To deactivate: (Y page 218).
The å ESP ®
OFF warning lamp in the
instrument cluster lights up.
X To activate: (Y page 218).
The å ESP ®
OFF warning lamp in the
instrument cluster goes out.
Characteristics when ESP ®

is deactivated
If ESP ®
is deactivated and one or more wheels
start to spin, the ÷ ESP®
warning lamp in
the instrument cluster flashes. In such situa-
tions, ESP ®
will not stabilise the vehicle. If you deactivate ESP
®
:
R ESP ®
no longer improves driving stability.
R engine torque is no longer limited and the
drive wheels are able to spin.
The

spinning of the wheels results in a cut-
ting action for better traction on loose sur-
faces.
R traction control is still activated.
R ESP ®
still provides support when you
brake.
ESP ®
trailer stabilisation General notes
If your vehicle/trailer combination begins to
lurch, ESP
®
assists you in this situation.
ESP ®
slows the vehicle down by braking and
limiting the engine output until the vehicle/
trailer combination has stabilised.
Important safety notes G
WARNING
If road and weather conditions are poor,
trailer
stabilisation will not be able to prevent
the vehicle/trailer combination from swerv-
ing. Trailers with a high centre of gravity can
tip over before ESP ®
can detect this. There is
a risk of an accident.
Always adapt your driving style to the prevail-
ing road and weather conditions.
If your vehicle/trailer combination begins to
lurch, you can only stabilise the vehicle/
trailer combination by depressing the brake
firmly.
ESP ®
trailer stabilisation is active above
speeds of about 65 km/h.
ESP ®
trailer stabilisation does not work if
ESP ®
is deactivated or disabled because of a
malfunction. 68
Driving safety systems
Safety

Have your vehicle winterproofed at a qualified
specialist workshop at the onset of winter.
Observe the notes in the "Winter operation"
section (
Y page 320).
Driving with summer tyres Observe the notes in the "Winter operation"
section (
Y page 320).
Slippery road surfaces G
WARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
This
increases the risk of skidding and having
an accident.
Do not shift down for additional engine brak-
ing on a slippery road surface.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Vehicles with manual transmission:
shift to neutral.
X Vehicles with automatic transmission:
shift the transmission to position N.
X Try to bring the vehicle under control by
using corrective steering.
You should drive particularly carefully on slip-
pery road surfaces. Avoid sudden accelera-
tion, steering and braking manoeuvres.
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freez-
ing point do not guarantee that the road sur-
face is free of ice. The road may still be icy,
especially

in wooded areas or on bridges. You
should pay special attention to road condi-
tions when temperatures are around freezing
point.
i For more information on driving with
snow chains, see ( Y page 321). Driving systems
Cruise control
Important safety notes If you fail to adapt your driving style, cruise
control

can neither reduce the risk of an acci-
dent nor override the laws of physics. Cruise
control cannot take into account road,
weather or traffic conditions. Cruise control
is only an aid. You are responsible for the dis-
tance to the vehicle in front, for vehicle speed,
for braking in good time, and for staying in the
lane.
Do not use cruise control:
R in road and traffic conditions which do not
allow you to maintain a constant speed
(e.g. in heavy traffic or on winding roads).
R on smooth or slippery roads. Braking or
accelerating can cause the drive wheels to
lose traction and the vehicle could then
skid.
R when there is poor visibility, e.g. due to fog,
heavy rain or snow.
If there is a change of drivers, advise the new
driver of the speed stored.
General notes Cruise control maintains a constant road
speed

for you. It brakes automatically in order
to avoid exceeding the set speed. You must
select a lower gear in good time on long and
steep downhill gradients, especially if the
vehicle is laden or towing a trailer. For vehi-
cles with automatic transmission, you need
to have selected manual drive program
M(Y page 156). By doing so, you will make
use of the braking effect of the engine. This
relieves the load on the brake system and
prevents the brakes from overheating and
wearing too quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a
steady speed for a prolonged period. You can
store any road speed above 30 km/h. 168
Driving systems
Driving and parking

i
If you do not depress the accelerator
pedal
within a few seconds, RACE START is
cancelled. The multifunction display shows
the RACE START cancelled message.
X Fully depress the accelerator pedal.
The engine speed is increased.
The RACE START Release brake to
start message appears in the multifunc-
tion display.
i If the brake pedal is not released after a
short while, RACE START is cancelled. The
multifunction display shows the RACE
START cancelled message.
X Take your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum accel-
eration.
The RACE

START active message appears
in the multifunction display.
RACE START is deactivated when the vehicle
reaches a speed of approximately
50 km/h.
Drive program S is activated. SPORT handling
mode remains activated.
RACE START is deactivated immediately if
you release the accelerator pedal during
RACE START or if any of the activation condi-
tions are no longer fulfilled. The RACE START
not possible or RACE START cancelled
message appears in the multifunction dis-
play.
i After using it several times in short suc-
cession, RACE START will be unavailable
until a certain distance has been driven. 4MATIC (permanent all-wheel drive)
4MATIC ensures that all four wheels are per-
manently driven. Together with ESP ®
, it
improves the traction of your vehicle when-
ever a drive wheel spins due to insufficient
grip.
If

you fail to adapt your driving style, 4MATIC
can neither reduce the risk of accident nor
override the laws of physics. 4MATIC cannot take account of road, weather and traffic con-
ditions. 4MATIC is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time, and for staying in the lane.
If

a drive wheel spins due to insufficient grip:
R when pulling away, only depress the accel-
erator pedal as far as is necessary.
R accelerate less when driving.
! Never tow the vehicle with one axle
raised. This may damage the transfer case.
Damage of this sort is not covered by the
Mercedes-Benz implied warranty. All
wheels must remain either on the ground
or be fully raised. Observe the instructions
for towing the vehicle with all wheels in full
contact with the ground.
i In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if
you use winter tyres (M+S tyres), with snow
chains if necessary. PARKTRONIC
Important safety notes PARKTRONIC is only an aid. It is not a substi-
tute for your attention to the immediate sur-
roundings. The responsibility for safe
manoeuvring and parking remains with you.
Make

sure that there are no persons, animals
or objects in range while manoeuvring and
parking.
! When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars. PARK-
TRONIC does not detect such objects when
they are in the immediate vicinity of the
vehicle. You could damage the vehicle or
the objects.
The sensors may not detect snow and
objects which absorb ultrasonic sources.
Ultrasonic sources, such as an automatic
car wash, a lorry's compressed-air brakes 182
Driving systems
Driving and parking

R
at any time, you can intervene in the steer-
ing procedure to correct it. Active Parking
Assist will then be cancelled.
R when transporting a load which protrudes
from your vehicle, you should not use
Active Parking Assist.
R never use Active Parking Assist when snow
chains are fitted.
R make sure that the tyre pressures are
always correct. This has a direct influence
on the parking characteristics of the vehi-
cle.
General notes Active Parking Assist is an electronic parking
aid with ultrasound. Ultrasound is used to
measure

the road on both sides of the vehicle.
A suitable parking space is indicated by the
parking symbol. Active steering intervention
can assist you during parking.
You may also use PARKTRONIC
(Y page 182). When PARKTRONIC is switched
off, Active Parking Assist is also unavailable.
Use Active Parking Assist for parking spaces:
R that are parallel to the direction of travel
R that are on straight roads, not bends
R that are on the same level as the road, e.g.
not on the pavement
Detecting parking spaces Objects located above the height range of
Active Parking Assist will not be detected
when the parking space is measured. These
are not taken into account when the parking
procedure is calculated, e.g. overhanging
loads,

tail sections or loading ramps of goods
vehicles. G
WARNING
If objects are located above the detection
range,
Active Parking Assist may start to steer
into the parking space too soon. As a result,
you could cause a collision. There is a risk of
an accident. If objects are located above the detection
range, stop the vehicle and switch Active
Parking Assist off.
For further information on the detection
range (Y page 183).
Active Parking Assist does not support you
parking in spaces that are parallel to the
direction of travel if:
R the parking space is on a kerb stone
R the parking space appears to be blocked,
for example by foliage or grass paving
blocks
R the range of movement is too small
R the

parking space is bordered by an obsta-
cle which is not clearly defined such as a
tree or a trailer :
Detected parking space on the left
; Parking symbol
= Detected parking space on the right
Active Parking Assist is activated automati-
cally when driving forwards. The system is
operational

at speeds of up to approximately
35 km/h. While in operation, the system inde-
pendently locates and measures parking
spaces on both sides of the vehicle.
Active Parking Assist will only detect parking
spaces:
R that are parallel to the direction of travel
R that are at least 1.5 m wide
R that are at least 1.3 m longer than your
vehicle
i In the case of parking spaces that are at
right angles to the direction of travel,
please ensure that the parking space is
long enough to accommodate your vehicle. Driving systems
187
Driving and parking Z

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