key battery MERCEDES-BENZ E-CLASS ESTATE 2012 Owners Manual

Battery (key)
Checking .......................................... 85
Important safety notes ....................85
Replacing ......................................... 85
Battery (vehicle)
Charging ........................................ 369
Display message ............................ 280
Important safety notes ..................367
Jump starting ................................. 370
Belt
see Seat belt
Belt force limiters (activation) ...........43
Belt tensioner Activation ......................................... 43
Function .......................................... .54
Blind Spo tAssist
Activating/deactivating .................257
Display message ............................ 285
Notes/function .............................. 225
Trailer towing ................................. 227
see Active Blind Spot Assist
BlueTEC (AdBlue ®
) ............................. 440
Bluetooth ®
SAP V3 telephone mod-
ule see Separate operating instructions
Bonnet
Active bonnet (pedestrian protec-
tion) ............................................... 344
Closing .......................................... .346
Display message ............................ 295
Opening ......................................... 345
Boot
Emergency release ..........................94
Boot lid
Display message ............................ 294
Opening dimensions ......................444
Boot load (maximum) ........................ 444
Bottle holders .................................... 329
Box (boot) .......................................... .322
Brake Assist System see BAS (Brake Assist System)
Brake fluid
Display message ............................ 272
Notes ............................................. 442
Brake lamps
Adaptive .......................................... .72
Display message ............................ 276Brakes
ABS .................................................. 70
BAS .................................................. 71
BAS PLUS ........................................ 71
Brake fluid (notes) .........................442
Display message ............................ 269
Driving tips .................................... 186
High-performance brake system ....188
Important safety notes ..................186
Parking brake ................................ 184
Warning lamp ................................. 300
Breakdown
see Flat tyre
Bulbs
see Changing bulbs C
Calling up a fault see Display messages
Car
see Vehicle
Care
Automatic car wash .......................351
Carpets .......................................... 357
Display ........................................... 355
Exterior lighting ............................. 354
Gea rors electo rlever .................... 356
High-pressure cleaner .................... 352
Interior ........................................... 355
Matt paintwork .............................. 353
Nigh tView Assist Plus ...................355
Notes ............................................. 350
Paint .............................................. 352
Plastic trim .................................... 356
Reversing camera ..........................354
Roof lining ...................................... 357
Seat bel t........................................ 357
Seat cover ..................................... 356
Sensors ......................................... 354
Steering wheel ............................... 356
Tai lpipes ....................................... 355
Trim pieces .................................... 356
Washing by hand ........................... 352
Wheels ........................................... 353
Windows ........................................ 353
Wiper blades .................................. 353
Wooden trim .................................. 3566
Index

Interior lighting
................................. 133
Automatic control system ..............134
Delayed switch-off (on-board
computer) ...................................... 261
Emergency lighting ........................134
Manual control ............................... 134
Overview ........................................ 133
Reading lamp ................................. 133
Setting the ambient lighting
brightness (on-board computer) ....260
Interior motion sensor ........................79
ISOFIX child seat securing system ....58 J
Jack Storage location ............................ 361
Using ............................................. 390
Jump start (engine)
see Jump starting (engine)
Jump starting (engine) ......................370 K
Key Changing the battery .......................85
Checking the battery .......................85
Convenience closing feature ............97
Convenience opening feature ..........96
Display message ............................ 297
Door central locking/unlocking .......83
Emergency key element ................... 84
Important safety notes ....................82
Loss ................................................. 87
Modifying the programming .............84
Positions (ignition lock) .................161
Problem (malfunction) .....................87
Starting the engine ........................163
KEYLESS-GO
Convenience closing ........................97
Display message ............................ 297
Locking ............................................ 83
Start/Stop button .......................... 161
Starting the engine ........................163
Unlocking ......................................... 83
Keyp ositions
Key ................................................ 161
KEYLESS GO .................................. 161Kickdown
Driving tips .................................... 174
Manual drive program ....................177
Kneebag ............................................... 46 L
Lamps see Warning and indicator lamps
Lane detection (automatic)
see Lane Keeping Assist
Lane Keeping Assist
Activating/deactivating .................257
Display message ............................ 284
Function/informatio n.................... 227
Lane package ..................................... 225
Lap time (RACETIMER) ......................265
Lashing eyelets ................................. 318
Licence plate lamp (display mes-
sage) ................................................... 277
Lighting see Lights
Lights
Activating/deactivating the Intel-
ligent Ligh tSystem ........................ 259
Activating/deactivating the inte-
rior lighting delayed switch-off .......261
Active light function .......................130
Automatic headlamp mode ............125
Cornering light function .................130
Dipped-bea mheadlamps ............... 126
Driving abroad ............................... 124
Foglamps ....................................... 126
Foglamps (extended range) ...........131
Hazard warning lamps ...................129
Headlamp flasher ........................... 129
Headlamp range ............................ 128
Ligh tswitc h................................... 125
Main-beam headlamps ................... 129
Motorway mode ............................. 131
Parking lamps ................................ 128
Rea rfoglamp ................................. 127
Setting the ambient lighting
brightness (on-board computer) ....260
Side lamps ..................................... 127
Switching Adaptive Highbeam
Assist on/off ................................. 260 Index
13

Changing the settings of the locking
system
You can change the settings of the locking
system. This means that only the driver's door
and the fuel fille rflap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel on your own.
X To change the setting: press and hold
down the %and& buttons on the
key simultaneously for approximately six
seconds until the battery chec klamp
flashes twice ( Ypage 85).
i If the setting of the locking system is
changed within the signal range of the vehi-
cle, pressing the &or% button:
R locks or
R unlocks the vehicle
The key now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button.
The KEYLESS-GO function is changed as fol-
lows:
X To unlock the driver's door: touch the
inner surface of the door handle on the
driver's door.
X To unlock centrally: touch the inner sur-
face of the door handle on the front-
passenger door or the rear door.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press
and hold down the %and& buttons
simultaneously for approximately six sec-
onds until the battery check lamp flashes
twice (Y page 85). Emergency key element
General notes If the vehicle can no longer be locked or
unlocked with the key, use the emergency
key element.
If you use the emergenc
ykey element to
unlock and open the driver's door or the boot
lid/tailgate, the anti-thef talarm system will
be triggered (Y page 78).
There are several ways to tur noff the alarm:
X To turn the alarm off with the key: press
the % or& button on the key.
or
X Insert the key into the ignition lock.
or
X To deactivate the alarm with KEYLESS-
GO: press the Start/Stop button in the igni-
tion lock. The key must be in the vehicle.
or
X Lock or unlock the vehicle using KEYLESS-
GO. The key must be outside the vehicle.
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the
key into the ignition lock.
Removing the emergency key element :
Release catch
; Emergency key element 84
KeyOpening and closing

X
Push release catch :in the direction of
the arrow and at the same time, remove
emergency key element ;from the key. Battery of the key
Important safety notes G
WARNING
Batteries are toxic and contain caustic sub-
stances. For this reason, keep batteries out of
the reach of children.
If a battery has been swallowed, visit a doctor
immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an
environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner
.Take discharged
batteries to a qualified spe-
cialis tworkshop or to a col-
lection point for used batter-
ies.
Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist
workshop. Checking the battery X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
X Change the battery (Y page 85).
i If the key battery is checked within the
signal reception range of the vehicle, press-
ing the &or% button:
R locks or
R unlocks the vehicle
i You can get a battery in any qualified spe-
cialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X
Take the emergency key element out of the
key (Y page 84). :
Battery compartment cover
; Emergency key element Key
85Opening and closing Z

X
Press emergency key element ;into the
opening in the key in the direction of the
arrow until battery compartment cover :
opens. When doing so, do not hold battery
compartment cover :shut.
X Remove battery compartment cover :.=
Battery
X Repeatedly tap the key against your palm
until battery =falls out.
X Inser tthe new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
X Make sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
X Insert the front tabs of battery compart-
ment cover :into the housing and then
press to close it.
X Insert emergency key element ;into the
key (Y page 84).
X Check the function of all key buttons on the
vehicle. 86
KeyOpening and closing

Problems with the key
Problem Possible causes/consequences and
M Solutions
You cannot lock or
unlock the vehicle
using the key. The key battery is discharged or nearly discharged.
X
Try again to lock/unlock the vehicle using the remote control
function of the key. Point the tip of the key at the driver's door
handle from close range and press the %or& button.
If this does not work:
X Check the key battery (Y page 85) and replace it if necessary
(Y page 85).
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the emergency key element. The key is faulty.
X
Lock (Y page 90) or unlock (Y page 90) the vehicle using
the emergency key element.
X Have the key checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. KEYLESS-GO is in standby mode because the vehicle has not been
unlocked for an extended period.
X
Pull the door handle and then turn the key to position 2in the
ignition lock. There is interference from a powerful source of radio waves.
X Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the %/& button. There is a fault with KEYLESS-GO.
X
Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the %/& button.
X Have KEYLESS-GO checked at a qualified specialist workshop.
If this does not work:
X Check the key battery (Y page 85) and replace it if necessary
(Y page 85).
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the emergency key element. You have lost a key. X
Have the key deactivated at a qualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Key
87Opening and closing Z

Problem Possible causes/consequences and
M Solutions
You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using the key. the on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 369).
or
X Jump-start the vehicle (Y page 370).
or
X Consult a qualified specialist workshop. Only vehicles without a
DIRECT SELECT lever:
The engine cannot be
started using the key. The steering lock is mechanically blocked.
X
Remove the key and reinsert it into the ignition lock. While doing
this, turn the steering wheel in both directions. The engine cannot be
started using KEYLESS-
GO. The key is in the
vehicle. Ad
oor is open. Therefore, the key cannot be detected as easily.
X Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves.
X
Start your vehicle with the key in the ignition lock. Doors
Important safety notes
G
WARNING
Only for the United Kingdom: if the vehicle
has been locked with the key or with KEY-
LESS-GO, the double lock function is activa-
ted as standard. It is then not possible to open
the doors from inside the vehicle.
Therefore, do not leave any people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance. As
a result, they may not be able to free them-
selves in the event of an emergency. They
could be seriously or even fatally injured by
prolonged exposure to extremely high or low
temperatures, for example. In this case, res- cuing people from outside the vehicle is diffi-
cult.
Deactivate the interior motion sensor before
you lock the vehicle. The doors can then be
opened from the inside after the vehicle has
been locked from the outside.
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open a door from inside the vehicle at any
time, even if it has been locked
R start the vehicle using akey which has been
left in the vehicle
R release the parking brake 88
DoorsOpening and closing

The system automatically switches down
from level
3to level 2after approximately
eight minutes.
Driver's and front-passenger seat: the sys-
tem automatically switches down from level
3 to level 2after approximately eight
minutes.
Rear seat: the system automatically
switches down from level 3to level 2after
approximately five minutes.
The system automatically switches down
from level 2to level 1after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level 1.
X Make sure that the key is in position 1or
2 in the ignition lock.
X To switch on: press button:repeatedly
until the desired heating level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off.
Problems with the seat heating The seat heating has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X Switch off electrical consumers that you do
not need, such as the rear window heating
or interior lighting. Switching the seat ventilation on/off
Switching on/off The three blue indicator lamps in the buttons
indicate the ventilation level you have selec-
ted.
X
Make sure that the key is in position 1or
2 in the ignition lock.
X To switch on: press button:repeatedly
until the desired ventilation level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
ventilation may switch off.
i You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature (Y page 96). The seat ven-
tilation of the driver's seat automatically
switches to the highest level.
Problems with the seat ventilation The seat ventilation has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X
Switch off electrical consumers that you do
not need, such as the rear window heating
or interior lighting. 116
SeatsSeats, steering wheel and mirrors

Vehicles with KEYLESS-GO: when you switch
off the ignition and open the driver's door, the
steering wheel heating is switched off.
i
The steering wheel heating does not
switch off automatically.
Problems with the steering wheel heat-
ing If steering wheel heating indicator lamp
=is
flashing, the steering wheel heating has
switched off automatically. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X Switch off electrical consumers that you do
not need, such as the rear window heating
or interior lighting.
Once the battery is sufficiently charged, the
steering wheel heating will switch back on
automatically. EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
Make sure that nobody can become trapped
when you activate the EASY-ENTRY/EXIT fea-
ture.
If there is a risk of someone becoming trap-
ped, stop the adjustment procedure. To halt
the procedure:
R press the steering column adjustment but-
ton.
R briefly press one of the memory function
position buttons.
The steering column stops moving immedi-
ately.
Do not keep the memory function position
button pressed down, otherwise the memory
function will start and the steering wheel and
seat will begin to move.
Never leave children unsupervised in the vehi-
cle. They could open the driver's door and thereby unintentionally activate the EASY-
ENTRY feature and become trapped.
The EASY-ENTRY/EXIT feature makes getting
in and out of yourv ehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board com-
puter (Y page 263).
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel tilts upwards if you:
R
remove the key from the ignition lock
R open the driver's door and KEYLESS-GO is
in position 1
R open the driver's door and the key is in
position 0or 1in the ignition lock
i The steering wheel only moves upwards if
it has not already reached the upper end
stop.
Position of the steering wheel for driv-
ing The steering wheel is moved to the previously
set position if:
R the driver's door is closed and
R you insert the key intot he ignition lock
or
R you press the Start/Stop button once on
vehicles with KEYLESS-GO.
If you close the driver's door with the key
inserted into the ignition lock, the steering
wheel is automatically moved to the previ-
ously set position.
The last position of the steering wheel is
stored when you switch off the ignition or
when you store the settingw ith the memory
function (Y page 121).
Crash-responsive EASY-EXIT feature If the crash-responsive EASY-EXIT feature is
triggered in an accident, the steering column
will move upwards when the driver's door is 118
Steering wheelSeats, steering wheel and mirrors

X
Make sure that the key is in position 1or
2 in the ignition lock.
X Briefly press button :.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
Setting the exterior mirrors If the battery has been disconnected or com-
pletely discharged, the exterior mirrors must
be reset. The exterior mirrors will otherwise
not fold in when you select the "Fold in mir-
rors when locking" function in the on-board
computer (Y page 264).
X Make sure that the key is in position 1in
the ignition lock.
X Briefly press button :.
Folding the exterior mirrors in or out
automatically If the "Fold in mirrors when locking" function
is activated in the on-board computer
(Y
page 264):
R the exterior mirrors fold in automatically as
soon as you lock the vehicle from the out-
side.
R the exterior mirrors fold out again automat-
ically as soon as you unlock the vehicle and
then open the driver's or front-passenger
door.
i If the exterior mirrors have been folded in
manually, they do not fold out.
Exterior mirror pushed out of position If an exterior mirror has been pushed out of
position, proceed as follows:
X
Vehicles without electrically folding
exterior mirrors: move the exterior mirror
into the correct position manually.
X Vehicles with electrically folding exte-
rior mirrors: press and hold mirror-folding
button :until you hear a click and then the mirrors engage in position
(Y
page 119).
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
(Y page 119). Automatic anti-dazzle mirrors
G
WARNING
If incident light from headlamps is prevented
from striking the sensor in the rear-view mir-
ror, for instance, by luggage piled too high in
the vehicle, the mirror's automatic anti-dazzle
function will not operate.
Incident light could then blind you. This may
distract you from the traffic conditions and,
as a result, you may cause an accident.
The rear-view mirror and the exterior mirror
on the driver's side automatically go into anti-
dazzle mode if the following conditions are
met simultaneously:
R the ignition is switched on and
R incident light from headlamps strikes the
sensor in the rear-view mirror.
The mirrors do not go into anti-dazzle mode if
reverse gear is engaged or if the interior light-
ing is switched on. Parking position for the exterior mir-
ror on the front-passenger side
Setting and storing the parking position Using reverse gear120
MirrorsSeats, steering wheel and mirrors