2012 MERCEDES-BENZ A-CLASS HATCHBACK child lock

Trailer towing ................................. 199
Bonnet
Active bonnet (pedestrian protec-tion) ............................................... 284
Closing ...........................................2 86
Display message ............................ 254
Important safety notes .................. 284
Opening ......................................... 285
Boot
see Tailgate
Boot load (maximum) ........................ 346
Brake Assist System
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 236
Notes ............................................. 344
Brake lamps
Adaptive .......................................... .64
Changing bulbs .............................. 115
Display message ............................ 240
Brakes
ABS .................................................. 61
Adaptive Brake Assist ...................... 63
BAS .................................................. 62
Brake fluid (notes) ........................ .344
Display message ............................ 230
Driving tips ................................... .166
Important safety notes .................. 166
Parking brake ................................ 163
Warning lamp ................................. 258
Breakdown
see Flat tyre
see Towing away/tow-starting
Bulbs
see Replacing bulbs C
Calling up a fault see Display messages
Car
see Vehicle
Car wash (care) ................................. 291
Care
Automatic car wash ....................... 291
Carpets .......................................... 296
Display .......................................... .295
Exhaust pipe .................................. 294 Exterior lighting ............................
.293
Gear or selector lever .................... 295
High-pressure cleaner .................... 291
Interior .......................................... .295
Matt paintwork .............................. 292
Notes ............................................. 290
Paint .............................................. 292
Plastic trim ................................... .295
Reversing camera .......................... 294
Roof lining ...................................... 296
Seat belt ........................................ 296
Seat cover ..................................... 296
Sensors ......................................... 294
Steering wheel ............................... 295
Trim pieces ................................... .295
Washing by hand ........................... 291
Wheels .......................................... .292
Windows ........................................ 293
Wiper blades .................................. 293
Wooden trim .................................. 295
Central locking
Automatic locking (on-board com-
puter) ............................................. 223
Locking/unlocking (key ).................. 75
Centre console
Lower section .................................. 35
Upper section .................................. 34
Changing bulbs
Brake lamps ................................... 115
Cornering light function ................. 114
Dipped-beam headlamp s............... 113
Main-beam headlamp s................... 114
Rear foglamp ................................. 115
Reversing lamps ............................ 115
Tail lamps ...................................... 115
Turn signals (front) ......................... 114
Turn signals (rear) .......................... 115
Child seat
Automatic recognition ..................... 52
ISOFIX .............................................. 53
On the front-passenger sea t............ 51
Problem (malfunction) ..................... 56
Recommendations ........................... 58
Suitable positions ............................ 56
Top Tether ....................................... 54
Child-proof locks
Important safety notes .................... 60
Rear doors ....................................... 60 6
Index

Overview ........................................1
11
Reading lamp ................................. 111
Setting the ambient lighting
brightness (on-board computer) .... 222
Interior motion sensor ........................ 70
ISOFIX child seat securing system .... 53J
Jack Storage location ............................ 299
Using ............................................. 326
Jump starting (engine) ......................308 K
Key Changing the battery ....................... 76
Checking the battery ....................... 76
Convenience closing feature ............ 85
Convenience opening feature .......... 84
Display message ............................ 256
Door central locking/unlocking ....... 75
Emergency key element ................... 75
Important safety notes .................... 74
Loss ................................................. 78
Modifying the programming ............. 75
Positions (ignition lock) ................. 143
Problem (malfunction) ..................... 78
Starting the engine ........................ 144
Key positions (ignition lock) ............ 143
Kickdown
Driving tips ................................... .154
Manual drive program .................... 158
Kneebag ............................................... 44 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating ................. 219
Display message ............................ 247
Function/informatio n.................... 199
Lane package ..................................... 197
Lap time (RACETIMER) ...................... 226
Lashing eyelets ................................. 273
Licence plate lamp (display mes-
sage) ................................................... 241 Light sensor (display message)
....... 242
Lighting
see Lights
Lights
Activating/deactivating the Intel-
ligent Light System ........................ 221
Activating/deactivating the inte-
rior lighting delayed switch-off ....... 223
Active light function ....................... 108
Automatic headlamp mod e............ 105
Cornering light function ................. 109
Dipped-beam headlamp s............... 105
Display message ............................ 239
Driving abroad ............................... 104
Foglamps ....................................... 106
Foglamps (extended range) ........... 109
Hazard warning lamps ................... 108
Headlamp flashe r........................... 108
Headlamp rang e............................ 107
Light switch ................................... 105
Main-beam headlamp s................... 107
Motorway mod e............................. 109
Parking lamps ................................ 106
Rear foglamp ................................. 106
Setting the ambient lighting
brightness (on-board computer) .... 222
Side lamps ..................................... 106
Switching Adaptive Highbeam
Assist on/of f................................. 222
Switching the daytime driving
lights on/off (on-board com-
puter) ............................................. 221
Switching the daytime driving
lights on/off (switch) ..................... 105
Switching the exterior lighting
delayed switch-off on/off (on-
board computer) ............................ 222
Switching the surround lighting
on/off (on-board computer) .......... 222
Turn signals ................................... 107
see Interior lighting
see Replacing bulbs
LIM indicator lamp
Cruise control ................................ 169
DISTRONIC PLUS ........................... 174
Variable SPEEDTRONIC ................. 171
Limiting the speed
see SPEEDTRONIC 12
Index

Loading guidelines
............................ 268
Locking
see Central locking
Locking (doors)
Automatic ........................................ 81
Emergency locking .......................... .81
From inside (central locking but-
ton) .................................................. 80
Locking centrally
see Central locking
Locking verification signal (on-
board computer) ............................... 223
Luggage compartment enlarge-
ment ................................................... 271
Important safety notes .................. 271
Luggage compartment floor
Important safety notes .................. 274
opening/closing ............................ 274
stowage well, under ....................... 274
Luggage net ....................................... 271
Lumbar support
Adjusting the 4-way lumbar sup-
port .................................................. 96 M
M+S tyres ........................................... 320
Main-beam headlamps
Changing bulb s.............................. 114
Display message ............................ 241
Switching Adaptive Highbeam
Assist on/of f................................. 109
Switching on/of f........................... 107
Maintenance
see ASSYST PLUS
Manual transmission
Engaging reverse gear ................... 151
Gear lever ...................................... 150
Pulling away ................................... 144
Shift recommendation ................... 151
Shifting to neutral .......................... 151
Starting the engine ........................ 144
Matt finish (cleaning instructions) .. 292
Memory card (audio) ......................... 215
Memory function ............................... 101
Mercedes-Benz Service Centre
see Qualified specialist workshop Message memory (on-board com-
puter) .................................................. 229
Messages
see Display messages
Mirrors
see Exterior mirrors
see Rear-view mirror
see Vanity mirror (in sun visor)
Mobile phone
Frequencies ................................... 336
Installation ..................................... 336
Menu (on-board computer) ............ 215
Notes/placing in the bracket ......... 279
Transmission output (maximum) .... 336
Mobile telephone
Pre-installed bracket ...................... 281
Modifying the programming (key) ..... 75
MOExtended tyres ............................. 300
Motorway mode ................................ 109
MP3
Operating ....................................... 215
see Separate operating instructions
Multifunction display
Function/note s............................. 210
Permanent display ......................... 220
Multifunction steering wheel
Operating the on-board compute r..2 09
Overview .......................................... 33 N
Navigation Menu (on-board computer) ............ 213
see separate operating instructions
Notes on running in a new vehicle .. 142 O
Occupant safety Children in the vehicle ..................... 50
Important safety notes .................... 40
Odometer .......................................... .211
see Total distance recorder
see Trip meter
Oil
see Engine oil
On-board computer
AMG menu ..................................... 226 Index
13

PRE-SAFE
®
takes pre-emptive measures to
protect occupants in certain hazardous sit-
uations.
PRE-SAFE ®
intervenes:
R when BAS activates, e.g. in emergency
braking situations
R when adaptive Brake Assist intervenes
powerfully on vehicles with DISTRONIC
PLUS
R in critical driving situations, e.g. when phys-
ical limits are exceeded and the vehicle
understeers or oversteers severely
PRE-SAFE ®
takes the following measures
depending on the hazardous situation detec-
ted:
R the front seat belts are pre-tensioned.
R vehicles with the memory function: the
front-passenger seat is adjusted if it is in an
unfavourable position.
R if the vehicle skids, the panorama sliding
sunroof and the side windows are closed so that only a small gap remains.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE ®
slackens
the belt pretensioning. All settings made by
PRE-SAFE ®
can then be reversed.
If the seat belts are not released:
X Move the backrest or seat back slightly, but
only when the vehicle is stationary.
The belt pretensioning is reduced and the
locking mechanism is released.
More information about seat belt adjustment,
a convenience function integrated into PRE-
SAFE (Y page 47). Seat belts
Important safety notes 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. Under certain circumstan- ces, this could cause severe or even fatal inju-
ries in the event of an accident.
Therefore, make sure that all occupants — in
particular, pregnant women — wear their seat
belts correctly at all times.
R The seat belt must fit snugly on your body
and must not be twisted. Therefore, avoid
wearing bulky clothing, e.g. a winter coat.
The shoulder section of the belt must be
routed across the centre of your shoulder — on no account across your neck or under
your arm — and pulled tight against your
upper body. The lap belt must always pass
across your lap as low down as possible, i.e.
over your hip joints — not across your abdo- men. If necessary, push the seat belt
slightly downwards and adjust it by pulling
it in the direction the seat belt retracts.
R Do not route the seat belt strap over sharp
or fragile objects. Please make sure that
such objects are not on or in your clothing,
e.g. spectacles, pens or keys etc. The seat
belt strap could become damaged and tear
during an accident and you or other vehicle occupants could be injured.
R Only one person should use each seat belt
at any one time. Children must never travel
sitting on the lap of another occupant. The
child will not be secured in the event of an
accident, heavy braking or sudden change
of direction. This may result in the child or
other occupants being seriously or fatally
injured.
R Persons under 1.50 mtall cannot wear the
seat belts correctly. For this reason secure persons less than 1.50 m tall in specially
designed, suitable restraint systems.
R Children under 1.50 m tall and younger
than twelve years of age cannot wear the
seat belts correctly. For this reason secure
them in special suitable child restraint sys-
tems installed on a suitable seat. Additional
information can be found in the Operating
Instructions in the chapter "Safety", "Chil-
dren in the Vehicle". Observe the installa- 46
Occupant safetySafety

Warning notice on the front-passenger sun visor
Warning symbol for a rearward-facing child
restraint system
Do not use a rearward-facing child restraint
system on a seat that is protected by an air-
bag installed in front of it.
Automatic child seat recognition on the front-passenger seat G
WARNING
If the 4 PASSENGER AIRBAG OFF indica-
tor lamp does not light up when the child
restraint system is fitted, the front-passenger airbag has not been disabled. If the front-
passenger airbag deploys, the child could be
seriously or even fatally injured.
Proceed as follows:
R do not use a rearward-facing child restraint
system on the front-passenger seat.
R fit a rearward-facing child restraint system
on a suitable rear seat.
or R
only use a forward-facing child restraint
system on the front-passenger seat and
move the front-passenger seat to the rear-
most position.
R have the automatic child seat recognition
checked at a qualified specialist workshop.
To ensure that the automatic child seat rec-
ognition on the front-passenger seat func-
tions/communicates correctly, never place
objects, e.g. a cushion, under the child
restraint system. The entire base of the child
restraint system must always rest on the seat
cushion. An incorrectly fitted child restraint
system cannot perform its intended protec-
tive function in the event of an accident, and
could lead to injuries. G
WARNING
Do not place electronic devices on the front-
passenger seat, e.g.:
R laptops, when switched on
R mobile phones
R cards with transponders, e.g. ski passes or
access cards
Signals from electronic equipment can cause
interference in the automatic child seat rec-
ognition sensor system. This can lead to a
system malfunction. This may cause the 4
PASSENGER AIRBAG OFF indicator lamp to
light up without there being a child seat with
transponders for automatic child seat recog-
nition fitted. The front-passenger airbag will
not then deploy during an accident. It is also
possible that the 6SRS warning lamp
lights up and/or the 4PASSENGER AIR-
BAG OFF indicator lamp does not light up
briefly when you turn the key in the ignition
lock to position 2.52
Children in the vehicleSafety

If the front-passenger seat of your vehicle
does not have automatic child seat recogni-
tion, this is indicated by a special sticker. The sticker is affixed to the side of the dashboard
on the front-passenger side. The sticker is
visible when you open the front-passenger
door.
Vehicles without automatic child seat recog-
nition on the front-passenger seat: if you turn
the key to position 2 in the ignition lock, the
45 indicator lamp lights up briefly but
has no function. It does not indicate that there is automatic child seat recognition on the
front-passenger seat. The sensor system for child restraint systems
in the front-passenger seat detects whether a special Mercedes-Benz child seat with a
transponder for automatic child seat recog-
nition has been fitted. In this case, 45
indicator lamp :lights up. The front-
passenger front airbag is disabled. i
If the front-passenger front airbag is dis-
abled by the automatic child seat recogni-
tion, the following remain enabled on the
front-passenger side:
R the sidebag
R the windowbag
R the belt tensioner
ISOFIX child seat securing system for
the rear seats G
WARNING
A child restraint system secured by the ISOFIX child seat securing system does not provide
sufficient protection for children weighing
more than 22 kg. For this reason, do not
secure children weighing more than 22 kg in achild restraint system secured by the ISOFIX
child seat securing system. If the child weighsmore than 22 kg, secure the child restraint
system with the vehicle seat belt as well. In
addition, when fitting a child restraint system, be sure to observe the manufacturer's instal-
lation instructions and the instructions for
correct use of the child restraint system. G
WARNING
The child restraint system cannot perform its protective function if it is not correctly fitted
to a suitable vehicle seat. The child cannot berestrained in the event of an accident, heavy
braking or sudden changes of direction. The
child could be seriously or even fatally injured.
For this reason, when fitting a child restraint
system, be sure to observe the manufactur-
er's installation instructions and the instruc-
tions for correct use of the child restraint sys-
tem.
For safety reasons, when installing child
restraint systems on the rear seats, only use
child restraint systems with the ISOFIX child
seat securing system, which are specially tes- ted and approved for Mercedes-Benz vehi-
cles.
An incorrectly fitted child restraint system
could come loose and seriously or even fatally Children in the vehicle
53Safety
Z

injure the child or other vehicle occupants.
When fitting the child restraint system, always make sure that it is engaged correctly in the
securing rings on both sides. G
WARNING
Please note that if child restraint systems, or
their retaining systems, are damaged or sub-
jected to a load in an accident, they may not
be able to provide their protective function.
This could result in serious or even fatal inju-
ries to the secured child in the event of an
accident, heavy braking or a sudden change in direction.
For this reason, have child restraint systems
and their anchorages which have been dam-
aged or subjected to a load in an accident
checked immediately at a qualified specialist
workshop.
! When fitting the ISOFIX child restraint
system, make sure that the seat belt for the centre seat does not get trapped. Other-
wise, the seat belt could be damaged. X
Install the ISOFIX child restraint system.
Comply with the manufacturer's instruc-
tions when installing the ISOFIX child
restraint system.
ISOFIX is a standardised securing system for specially designed child restraint systems on
the rear seats. Securing rings :for two ISO-
FIX child restraint systems are fitted on the
left and right of the rear seats. Top Tether Important safety notes
G
WARNING
Make sure that the rear seat backrest is fully
locked. When the red lock verification indica- tors on the left and right are no longer visible,
the rear seat backrests are locked. If the rear
seat backrests are not locked, occupants
could be injured in the event of an accident,
e.g. by objects that are thrown forward from
the luggage compartment. Top Tether provides an additional connection
between the ISOFIX child restraint system
secured with ISOFIX and the rear seat. It
helps reduce the risk of injury even further.
The Top Tether anchorage points are fitted on
the rear side of the rear seat backrests.
X Vehicles with adjustable head
restraints: move the head restraint
upwards.
X Route Top Tether belt =under the head
restraint between the two head restraint
bars. 54
Children in the vehicleSafety

Weight
catego-
ries Size cate-
gory Manufac-
turer Type Approval
number
(E1 ...) Order
number 6 Auto-
matic
child seat
recogni-
tion D – – – – –
C – – – – –
Group I:
9to 18 kg
D – – – – –
C – – – – –
B – – – – –
B1 Britax
Römer DUO PLUS 04 301133 A000 970
11 00 Yes
A000 970
16 00 No
A – – – – –
Child-proof locks
Important safety notes G
WARNING
Activate the child-proof locks for the rear
doors and the override switch for the rear
windows when children are travelling in the
vehicle. Otherwise, the children could open
doors or side windows while the vehicle is in
motion and injure themselves or others. G
WARNING
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system. They could injure them-
selves on parts of the vehicle. They could also
be seriously or even fatally injured by pro-
longed exposure to extreme heat or cold.
Do not expose the child restraint system to
direct sunlight. Parts of the child restraint sys- tem could heat up and the child could burn
herself/himself on them. If a child opens a door, the child or other per-
sons could be injured as a result. They could
get out and injure themselves or be injured by
a passing vehicle.
Observe the general notes on the HOLD func-
tion, which can be found under the same key- word.
Child-proof locks for the rear doors You can secure each door individually with
the child-proof locks on the rear doors. A door
secured with a child-proof lock cannot be
6 Colour code 9H95. 60
Children in the vehicleSafety