key battery MERCEDES-BENZ E-Class WAGON 2012 W212 Owner's Manual

ATA (Anti-Theft Alarm system)Activating/deactivating ...................72
Function ........................................... 72
Switching off the alarm ....................72
ATTENTION ASSIST
Activating/deactivating .................225
Display message ............................ 249
Function/notes ............................. 199
Audio menu (on-board computer) .... 221
Audio system see separate operating instructions
Authorized Mercedes-Benz Center
see Qualified specialist workshop
AUTO lights
Display message ............................ 245
see Lights
Automatic engine start (ECO start/
stop function) .................................... 149
Automatic engine switch-off (ECO
start/stop function) .......................... 149
Automatic headlamp mode .............. 116
Automatic transmission Automatic drive program ...............157
Changing gear ............................... 155
DIRECT SELECT lever .....................153
Display message ............................ 257
Driving tips .................................... 155
Emergency running mode ..............160
Kickdown ....................................... 156
Manual drive program ....................158
Problem (malfunction) ...................160
Program selector button ................156
Pulling away ................................... 147
Selector lever ................................ 152
Shift ranges ................................... 157
Starting the engine ........................147
Steering wheel paddle shifters ......157
Transmission position display ........153
Transmission positions ..................155
Automatic transmission
emergency mode ............................... 160
B
Back support see Lumbar support
Bag hook ............................................ 282
BAS (Brake Assist System) ................. 64
Basic settings
see Settings
BAS PLUS (Brake Assist System
PLUS) .................................................... 64
Battery (SmartKey) Checking .......................................... 78
Important safety notes ....................78
Replacing ......................................... 78
Battery (vehicle)
Charging ........................................ 337
Display message ............................ 247
Important safety notes ..................335
Jump starting ................................. 338
Belt
see Seat belts
Blind Spot Assist
Activating/deactivating .................225
Notes/function .............................. 203
see Active Blind Spot Assist
BlueTEC (DEF) .................................... 387
Bottle holder ...................................... 290
Brake Assist System see BAS (Brake Assist System)
Brake fluid
Display message ............................ 237
Notes ............................................. 388
Brake fluid level ................................ 312
Brake lamps Display message ............................ 243
Brakes
ABS .................................................. 64
BAS .................................................. 64
BAS PLUS ........................................ 64
Brake fluid (notes) .........................388
Display message ............................ 235
Driving tips .................................... 171
High-performance brake system ....173
Important safety notes ..................171
Maintenance .................................. 172
Parking brake ................................ 169
Warning lamp ................................. 263
Breakdown
see Flat tire
see Towing away/tow-starting
Bulbs
see Changing bulbs Index5

Seat beltsAdjusting the driver's and front-
passenger seat belt .........................54
Adjusting the height ......................... 54
Belt force limiters ............................ 56
center rear-compartment seat .........55
Cleaning ......................................... 320
Correct usage .................................. 52
Emergency Tensioning Devices ........ 56
Fastening ......................................... 53
Important safety guidelines .............51
Releasing ......................................... 55
Safety guidelines ............................. 39
Special seat belt retractor ...............59
Switching belt adjustment on/off
(on-board computer) ......................229
Warning lamp ................................. 261
Warning lamp (function) ................... 55
Seats
Active multicontour seat ................102
Adjusting (electrically) ...................100
Adjusting the 4-way lumbar
support .......................................... 103
Adjusting the head restraint ..........100
Cleaning the cover .........................320
Correct driver's seat position ........... 98
Folding the backrest (rear
compartment) forwards/back .......280
Important safety notes ....................99
Seat heating problem ....................106
Seat ventilation problem ................106
Storing settings (memory
function) ........................................ 111
Switching seat heating on/off .......105
Switching seat ventilation on/off ..106
Sensors (cleaning instructions) ....... 317
Service see ASSYST PLUS service interval
display
Service interval display
Displaying service messages .........313
Hiding service messages ...............313
Notes ............................................. 313
Service messages ..........................312
Service menu (on-board computer) . 226
Service products Brake fluid ..................................... 388
Capacities ...................................... 384Coolant (engine) ............................ 389
DEF special additives .....................387
Engine oil ....................................... 387
Fuel ................................................ 385
Important safety notes ..................382
Refrigerant (air-conditioning
system) .......................................... 388
Washer fluid ................................... 389
Settings
Factory (on-board computer) .........230
On-board computer .......................226
Setting the air distribution ............... 137
Setting the airflow ............................ 137
SETUP (on-board computer) ............. 230
Side impact air bag ............................. 42
Side marker lamp (display
message) ............................................ 244
Side windows Convenience closing feature ............91
Convenience opening feature ..........91
Important safety information ...........90
Opening/closing .............................. 90
Problem (malfunction) .....................92
Resetting ......................................... 92
Skibag ................................................ 277
Sliding sunroof Important safety notes ....................93
Opening/closing .............................. 94
Problem (malfunction) .....................96
Resetting ......................................... 94
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery .......................78
Changing the programming .............77
Checking the battery .......................78
Convenience closing feature ............91
Convenience opening feature ..........91
Display message ............................ 259
Door central locking/unlocking .......74
Important safety notes ....................74
Loss ................................................. 80
Mechanical key ................................ 77
Positions (ignition lock) .................145
Problem (malfunction) .....................80
Starting the engine ........................147
Snow chains .............................. 174, 34916Index

V
Vanity mirror (in sun visor) .............. 291
Vehicle Correct use ...................................... 25
Data acquisition ............................... 26
Display message ............................ 257
Equipment ....................................... 22
Individual settings ..........................226
Limited Warranty ............................. 26
Loading .......................................... 358
Locking (in an emergency) ...............84
Locking (SmartKey) .......................... 75
Lowering ........................................ 333
Maintenance .................................... 23
Parking for a long period ................ 169
Pulling away ................................... 147
Raising ........................................... 330
Reporting problems .........................25
Towing away .................................. 340
Transporting .................................. 342
Unlocking (in an emergency) ...........83
Unlocking (SmartKey) ......................75
Vehicle data ................................... 390
Vehicle battery
see Battery (vehicle)
Vehicle data ....................................... 390
see Technical data
Vehicle dimensions ........................... 390
Vehicle emergency locking ................ 84
Vehicle identification number see VIN
Vehicle identification plate .............. 381
Vehicle level AIRMATIC ...................................... 189
Vehicle level (display message) ....... 249
Vehicle tool kit .................................. 322
Video (DVD) ........................................ 222
VIN ...................................................... 381
W
Warning and indicator lamps ABS ................................................ 264
Brakes ........................................... 263
Check Engine ................................. 267
Coolant .......................................... 268
Cruise control ................................ 176
Distance warning ........................... 270
DISTRONIC PLUS ........................... 270
ESP ®
.............................................. 264
ESP ®
OFF ....................................... 265
Fuel tank ........................................ 267
LIM (DISTRONIC PLUS) ..................180
Overview .......................................... 30
PASSENGER AIRBAG OFF
indicator lamp .................................. 44
Reserve fuel ................................... 267
Seat belt ........................................ 261
SPORT handling mode ...................265
SRS ................................................ 266
Tire pressure monitor ....................271
Warranty ............................................ 381
Washer fluid Display message ............................ 259
see Windshield washer system
Wheel bolt tightening torque ........... 333
Wheel chock ...................................... 329
Wheels Changing a wheel .......................... 329
Checking ........................................ 347
Cleaning ......................................... 315
Important safety notes ..................346
Interchanging/changing ................370
Mounting a wheel .......................... 332
Removing a wheel ..........................331
Storing ........................................... 371
Tightening torque ........................... 333
Wheel size/tire size .......................371
Window curtain air bag
Display message ............................ 239
Operation ......................................... 44
Windows
Cleaning ......................................... 317
see Side windows
Windshield
Defrosting ...................................... 138
Windshield washer system .............. 311
Notes ............................................. 389
Windshield wipers
Problem (malfunction) ...................126
Rear window wiper ........................125
Replacing the wiper blades ............125
Switching on/off ........................... 12420Index

iUSA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
The product label with FCC ID and IC
certification number can be found in the
battery case of the SmartKey.
i Canada only:
This device complies with RSS-Gen of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause interference,
and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
The product label with FCC ID and IC
certification number can be found in the
battery case of the SmartKey.
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)
R BAS ( Brake Assist System)
R BAS PLUS ( Brake Assist System Plus*)
R ESP ®
(E lectronic Stability Program)
R EBD ( Electronic Brake force Distribution)
R ADAPTIVE BRAKE
R PRE-SAFE ®
Brake
Important safety notesGWARNING
The following factors increase the risk of
accidents:
R Excessive speed, especially in turns
R Wet and slippery road surfaces
R Following another vehicle too closely
The driving safety systems described in this
section cannot reduce these risks or prevent
the natural laws of physics from acting on the
vehicle. They cannot increase braking or
steering efficiency beyond that afforded by
the condition of the vehicle brakes and tires
or the traction afforded.
Only a safe, attentive, and skillful driver can
prevent accidents.
The capabilities of a vehicle equipped with the
driving safety systems described in this
section must never be exploited in a reckless
or dangerous manner which could jeopardize
the user's safety or the safety of others.
Always adjust your driving style to the
prevailing road and weather conditions and
keep a safe distance to other road users and
objects on the street.
If a driving system malfunctions, other driving
safety systems may also switch off. Observe
indicator and warning lamps that may come
on as well as messages in the multifunction
display that may appear.
i Please note that the driving safety
systems described only work as effectively
as possible when there is adequate contact
between the tires and the road surface. Pay
particular attention to the information
regarding tires, recommended minimum
tire tread depths etc. in the "Wheels and
tires" section ( Y page 346).
In wintry driving conditions, always use
winter tires (M+S tires) and if necessary,
snow chains. Only in this way will the
driving safety systems described in this
section work as effectively as possible.
Driving safety systems63SafetyZ

GWARNING
PRE-SAFE®
Brake cannot always detect
complex traffic situations properly.
In these cases, PRE-SAFE(R) Brake may:
R give an unnecessary warning and then
brake the vehicle
R neither give a warning nor intervene
There is a risk of an accident. Always pay
particular attention to the traffic situation and
be ready to brake, especially if PRE-SAFE(R)
Brake warns you. Terminate the intervention
in a non-critical driving situation.
In particular, the detection of obstacles can
be impaired if there is:
R dirt on the sensors or anything else
covering the sensors
R snow or heavy rain
R interference by other radar sources
R the possibility of strong radar reflections,
for example in parking garages
R a narrow vehicle traveling in front, e.g. a
motorbike
R a vehicle traveling in front on a different line
GWARNING
PRE-SAFE ®
Brake does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R in curves
As a result, PRE-SAFE ®
Brake cannot
intervene in critical situations. There is a risk
of an accident. Always pay careful attention
to the traffic situation and be ready to brake.
In order to maintain the appropriate distance
to the vehicle in front and thus prevent a
collision, you must apply the brakes yourself.
XTo activate/deactivate: activate or
deactivate PRE-SAFE ®
Brake in the on-
board computer ( Y page 225).
The Ä symbol appears in the
multifunction display as long as the HOLD
function is not activated ( Y page 187).
On vehicles with Parking Guidance, the
Ä symbol is displayed when
transmission position P is selected or if you
drive faster than 22 mph(35 km/h).
For PRE-SAFE ®
Brake to assist you when
driving, the radar sensor system must be
switched on ( Y page 229) and operational.
Following damage to the front end of the
vehicle, have the configuration and operation
of the radar sensors checked at a qualified
specialist workshop. This also applies to
collisions at low speeds where there is no
visible damage to the front of the vehicle.
Theft deterrent locking systems
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
SmartKey that is left inside the vehicle.
XTo activate with the SmartKey: remove
the SmartKey from the ignition lock.XTo activate with KEYLESS-GO: switch the
ignition off and open the driver's door.XTo deactivate: switch on the ignition.
i
The immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be
started when the starter battery is fully
charged, the immobilizer may be faulty.
Contact an authorized Mercedes-Benz
Center or call 1-800-FOR-MERCedes (in
USA) or 1-800-387-0100 (in Canada).
Theft deterrent locking systems71SafetyZ

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 25).
SmartKey
Important safety notes
GWARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.GWARNING
If a key ring is too heavy or too large, the
weight acting on the key could cause it to turn
in the ignition lock or catch on the steering
wheel. This could cause the engine to be
switched off suddenly. You could lose control
of the vehicle and cause an accident. Do not
attach any heavy or large key rings to the key
that is inserted in the ignition.
General notes
If you cannot lock or unlock the vehicle with
the SmartKey, either the battery in the
SmartKey is discharged, the SmartKey is
faulty or the starter battery is discharged.
XCheck the battery in the SmartKey and
replace it if necessary ( Y page 78).XUnlock the driver's door using the
mechanical key ( Y page 83).XLock the vehicle using the mechanical key
( Y page 84).XHave the starter battery and the battery
contacts checked at a qualified specialist
workshop.
If the SmartKey is faulty, contact Roadside
Assistance or a qualified specialist workshop.
SmartKey functions
General notes
i USA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
74SmartKeyOpening/closing

Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
The Product label with FCC ID and IC
certification number can be found in the
battery case of the SmartKey.
i Canada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause interference,
and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
The Product label with FCC ID and IC
certification number can be found in the
battery case of the SmartKey.
Locking and unlocking centrally
The SmartKey centrally locks/unlocks:
R the doors
R the trunk lid/tailgate
R the fuel filler flap
:& Locks the vehicle;F Unlocks the trunk lid/tailgate=% Unlocks the vehicle
When unlocking, the turn signals flash once.
When locking, they flash three times.
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer ( Y page 227).
If you activate the acoustic locking
confirmation function, you will hear the
following, depending on the date of
production of the vehicle:
R an acoustic signal when locking
or
R one acoustic signal when unlocking and
three when locking.
The audible signal can be activated and
deactivated using the on-board computer
( Y page 228).XTo unlock centrally: press the %
button.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle is locked again.
R the theft deterrent locking system is armed
again.
XTo lock centrally: press the & button.
KEYLESS-GO
General notes
i USA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
The Product label with FCC ID and IC
certification number can be found in the
battery case of the SmartKey.
i Canada only:
SmartKey75Opening/closingZ

This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
The Product label with FCC ID and IC
certification number can be found in the
battery case of the SmartKey.
Important notes on the use of KEYLESS-
GO
R The KEYLESS-GO key can be used like a
conventional key.
R You can combine KEYLESS-GO functions
with those of a conventional key, e.g.
unlock with KEYLESS-GO and lock with the
& button.
R Always carry your KEYLESS-GO key on your
person.
R Do not keep the KEYLESS-GO key together
with:
- electronic devices, e.g. a mobile phone
or another key
- metallic objects, e.g. coins or metal foil.
This can affect the functionality of
KEYLESS-GO.
R When locking and unlocking using
KEYLESS-GO, the distance between the
SmartKey and the corresponding door
handle must not exceed 3 ft (1 m).
R If the vehicle is parked for more than
72 hours, the KEYLESS-GO function is
deactivated. Pull the outer door handle and
switch on the ignition to reactivate the
KEYLESS-GO function.
R If the KEYLESS-GO key is removed from the
vehicle, it is possible that the system may
not recognize the SmartKey. The vehicle
can then not be locked or started using
KEYLESS-GO.
R If the KEYLESS-GO key has been removed
from the vehicle, e.g. if a passenger leaves
the vehicle with a KEYLESS-GO key:
- if the start/stop button is pressed or if
an attempt is made to lock the vehicle
with the locking button on the outer door
handle, the Key Not Detected message
appears in the multifunction display
- when the engine is running, the red Key
Not Detected message appears in the
multifunction display as you pull away.
Find the KEYLESS-GO key and change its
position in the vehicle. Carry the
KEYLESS-GO key in your shirt pocket, for
example.
R If you have started the engine with the
Start/Stop button, you can switch it off
again by:
- pressing the Start/Stop button again
- inserting the KEYLESS-GO key into the
ignition lock if the vehicle is stationary
and the automatic transmission is in park
position P.
R You could unlock the vehicle by mistake if
the distance between the KEYLESS-GO key
and the vehicle is less than 3 ft (1 m) and:
- an exterior door handle is hit by a water
jet
or
- you clean an exterior door handle.
R Bear in mind that the engine can be started
by any of the vehicle occupants if there is
a KEYLESS-GO key in the vehicle.76SmartKeyOpening/closing

X To unlock the vehicle: touch the inner
surface of the door handle.XTo lock the vehicle: touch sensor
surface :.XConvenience closing feature: touch
recessed sensor surface ; for an
extended period ( Y page 92).
If you pull on the handle of the trunk lid/
tailgate, only the trunk/cargo compartment
of the vehicle is unlocked.
Changing the settings of the locking
system
You can change the setting of the locking
system in such a way that only the driver's
door and the fuel filler flap are unlocked. This
is useful if you frequently travel on your own.
XTo change the setting: press and hold
down the % and & buttons
simultaneously for approximately six
seconds until the battery check lamp
( Y page 78) flashes twice.
i
If the setting of the locking system is
changed within the signal range of the
vehicle, pressing the & or % button
locks or unlocks the vehicle.
The SmartKey now functions as follows:
XTo unlock the driver's door: press the
% button once.XTo unlock centrally: press the %
button twice.XTo lock centrally: press the & button.The KEYLESS-GO function is changed as
follows:XTo unlock the driver's door: touch the
inner surface of the door handle on the
driver's door.XTo unlock centrally: touch the inner
surface of the door handle on the front-
passenger door or the rear door.XTo lock centrally: touch the outer sensor
surface on one of the door handles.
Restoring the factory settings
XPress the % and & buttons
simultaneously for approximately six
seconds until the battery check lamp
flashes twice.
Mechanical key
General notes
If the vehicle can no longer be locked or
unlocked with the SmartKey, use the
mechanical key.
If you use the mechanical key to unlock and
open the driver's door or the trunk lid/
tailgate, the anti-theft alarm system will be
triggered ( Y page 72).
There are several ways to turn off the alarm:
XTo turn the alarm off with the
SmartKey: press the % or & button
on the SmartKey.
or
XInsert the SmartKey into the ignition lock.
or
XTo deactivate the alarm with KEYLESS-
GO: press the Start/Stop button in the
ignition lock. The SmartKey must be in the
vehicle.
or
XLock or unlock the vehicle using KEYLESS-
GO. The SmartKey must be outside the
vehicle.SmartKey77Opening/closingZ

If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked
automatically.XTo unlock the fuel filler flap: insert the
SmartKey in the ignition lock.
Removing the mechanical key
XPush release catch : in the direction of
the arrow and at the same time, remove
mechanical key ; from the SmartKey.
SmartKey battery
Important safety notes
Have the batteries changed at a qualified
specialist workshop.
GWARNING
Batteries contain toxic substances.
Swallowing batteries can lead to serious
health issues or death.
Keep batteries out of the reach of children.
Seek medical attention immediately if a
battery is swallowed.
GWARNING
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Observe
government disposal guidelines. California
residents, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm .
Checking the batteryXPress the & or % button.
The battery is working properly if battery
check lamp : lights up briefly
If battery check lamp : does not light up
briefly during the test, the battery is
discharged.
XChanging the battery ( Y page 78)
i
You can obtain the battery at a qualified
specialist workshop.
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the & or % button locks or
unlocks the vehicle.
Changing the battery
You require a CR 2025 3 V cell battery.
XTake the mechanical key out of the
SmartKey ( Y page 77).XPress mechanical key ; into the opening
in the SmartKey in the direction of the78SmartKeyOpening/closing