2014 MERCEDES-BENZ C-Class SEDAN key battery

Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshops
see Qualified specialist workshop
AUTO lights
Display message ............................ 232
see Lights
Automatic engine start (ECO start/
stop function) .................................... 151
Automatic engine switch-off (ECO
start/stop function) ..........................151
Automatic headlamp mode ..............115
Automatic transmission Automatic drive program ...............157
Changing gea r............................... 156
Display message ............................ 244
Driving tips .................................... 156
Emergency running mode ..............161
Kickdow n....................................... 156
Manual drive program ....................159
Overview ........................................ 154
Problem (malfunction) ...................161
Progra mselecto rbutton ................ 156
Pulling away ................................... 150
Releasing the parking lock
manually ........................................ 161
Selector leve r................................ 154
Shift range s................................... 158
Starting the engine ........................149
Steering wheel paddle shifters ......157
Transmission position displa y........ 155
Transmissio npositions .................. 155
Automatic transmission
emergency mode ............................... 161 B
Backup lamp Changing bulbs .............................. 124
Display message ............................ 232
Bag hook ............................................ 266
BAS (Brake Assist System) .................66
BAS PLUS (Brake Assist System
PLUS) .................................................... 66
Battery (SmartKey) Checking .......................................... 79
Important safety notes ....................78
Replacing ......................................... 79Battery (vehicle)
Charging ........................................ 304
Display message ............................ 235
Important safety notes ..................302
Jump starting ................................. 306
Blin dSpot Assist
Activating/deactivating .................214
Display message ............................ 238
Notes/function .............................. 193
see Active Blind Spot Assist
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 225
Notes ............................................. 355
Brake lamps
Changing bulbs .............................. 124
Display message ............................ 231
Brakes
ABS .................................................. 65
BAS .................................................. 66
BAS PLUS ........................................ 66
Brake fluid (notes) .........................355
Display message ............................ 223
Driving tips .................................... 168
High-performance brake system ....170
Important safety notes ..................168
Maintenance .................................. 169
Parking brake ................................ 165
Warning lamp ................................. 250
Breakdown
see Flat tire
see Towing away/tow-starting
Bulbs
see Replacing bulbs C
California Important notice for retail
customers and lessees ....................23
Calling up a malfunction
see Display messages
Car
see Vehicle
Care
Carpets .......................................... 297
Car wash ........................................ 292 Index
5

Settings
Factory (on-board computer) .........219
On-board computer .......................215
Setting the air distribution ...............138
Setting the airflow ............................139
SETUP (on-board computer) .............219
Side impact air bag .............................45
Side marker lamp (display
message) ............................................ 232
Side windows Cleaning ......................................... 294
Convenience closing feature ............89
Convenience opening feature ..........89
Important safety information ...........87
Opening/closing .............................. 88
Problem (malfunction) .....................90
Resetting ......................................... 90
Sliding sunroof
Important safety notes ....................91
Opening/closing .............................. 92
Problem (malfunction) .....................94
Resetting ......................................... 92
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery .......................79
Changing the programming .............77
Checking the battery .......................79
Convenience closing feature ............89
Convenience opening feature ..........89
Display message ............................ 246
Door central locking/unlocking .......76
Important safety notes ....................76
Loss ................................................. 80
Mechanical key ................................ 78
Positions (ignition lock) .................147
Problem (malfunction) .....................80
Starting the engine ........................149
Snow chains ...................................... 317
Sockets General notes ................................ 271
Rea rcompartmen t......................... 271
Spare wheel
Storage location ............................ 346
Specialist workshop ............................ 25
Special seat bel tretractor .................. 61 Speed
,controlling
see Cruise control
Speedometer
Digital ............................................ 208
In the Instrument cluster .................31
Segments ...................................... 205
Selecting the unit of measurement 215
see Instrument cluster
SPORT handling mode
Activating/deactivating (AMG
vehicles) .......................................... 69
Warning lamp ................................. 253
SRS
see SRS (Supplemental Restraint
System)
SRS (Supplemental Restraint
System)
Display message ............................ 226
Introduction ..................................... 41
Warning lamp ................................. 255
Warning lamp (function) ................... 41
Standing lamps
Changing bulbs .............................. 123
Display message ............................ 231
Switching on/off ........................... 116
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 149
Steering (display message) ..............246
Steering wheel Adjusting (electrically). ..................106
Adjusting (manually). .....................106
Button overview ............................... 33
Buttons (on-board computer) ......... 205
Cleaning ......................................... 296
Important safety notes ..................105
Paddle shifters ............................... 157
Storing settings (memory function) 110
Steering wheel paddle shifters ........157
Stopwatch (RACETIMER) ................... 220
Stowage areas ................................... 262
Stowage compartments Armrest (under) ............................. 263
Cuph olders ................................... 267
Eyeglasses compartment ...............263
Glove box ...................................... .263
Important safety information .........262
Rea r............................................... 26416
Index

X
To activate with the SmartKey: remove
the SmartKey from the ignition lock.
X To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X To deactivate: switch on the ignition.
i The immobilize ris 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 the
USA) or 1-800-387-0100 (in Canada). ATA (anti-theft alarm system)
Av isual and audible alarm is triggered if the
alarm system is armed and you open:
R a door
R the vehicle with the mechanical key
R the trunk lid
R the hood
The alarm is not switched off, even if you
close the open door that triggered it, for
example.
i If the alarm continues for more than
30 seconds, the mbrac eemergency call
system automatically notifies the
Customer Assistance Center. This is done
either by text message or data connection.
The emergency call system sends the
message or data provided that:
R you have subscribed to the mbrace
service.
R the mbrace service has been activated
properly.
R the necessary mobile phone network is
available. X
To arm: lock the vehicle with the SmartKey
or KEYLESS-GO.
Indicator lamp 0002flashes. The alarm
system is armed after approximately
15 seconds.
X To disarm: unlock the vehicle with the
SmartKey or KEYLESS-GO.
X To stop the alarm using the SmartKey:
insert the SmartKey into the ignition lock.
The alarm is switched off.
or
X Press the 000Bor000A button on the
SmartKey.
The alarm is switched off.
X To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The
SmartKey must be outside the vehicle.
The alarm is switched off.
or
X Press the Start/Stop button on the
dashboard. The SmartKey must be inside
the vehicle.
The alarm is switched off. Theft deterrent locking system
73Safety Z

vehicle is unlocked
.This is useful if you
frequently travel on your own.
X To change the setting: press and hold
down the 000Band000A buttons
simultaneously for approximately six
seconds until the battery check lamp
(Y page 79) flashes twice.
i If the setting of the locking system is
changed within the signal range of the
vehicle, pressing the 000Aor000B button:
R locks or
R unlocks the vehicle
The SmartKey now functions as follows:
X To unlock the driver's door: press the
000B button once.
X To unlock centrally: press the000B
button twice.
X To lock centrally: press the000Abutton.
The KEYLESS-GO function is changed as
follows:
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
surface 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
(Y page 77).
X To restore the factory settings: press
and hold down the 000Band000A 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 or the KEYLESS-
GO key, use the mechanical key. If you use the mechanical key to unlock and
open the driver's door or the trunk lid, the
anti-theft alarm system will be triggered
(Y
page 73).
X To end the alarm: insert the SmartKey into
the ignition lock.
i With KEYLESS-GO: remove the Start/
Stop button from the ignition lock
beforehand.
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked
automatically.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch 0002in the direction of
the arrow and at the same time remove
mechanical key 0003from the SmartKey. SmartKey battery
Important safety notes Mercedes-Ben
zrecommends that you have
the batteries replaced at a qualified specialist
workshop. G
WARNING
Batteries contain toxic and corrosive
substances. If batteries are swallowed, it can
result in severe health problems. There is a
risk of fatal injury. 78
SmartKeyOpening and closing

Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
Checking the battery X
Press the 000Aor000B button.
The battery is working properly if battery
check lamp 0002lights up briefly.
If battery check lamp 0002does not lightup
briefly during the test, the battery is
discharged.
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the 000Aor000B button:
R locks or
R unlocks the vehicle
X Change the battery (Y page 79).
i You can get a battery at a qualified
specialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X Take the mechanical key out of the
SmartKey (Y page 78). X
Press mechanical key 0003intothe SmartKey
opening in the direction of the arrow until
battery compartment cover 0002opens. Do
not hold battery compartment cover 0002
closed while doing so.
X Remove battery compartment cover 0002. X
Repeatedly tap the SmartKey against your
palm until battery 0022falls out.
X Insert the new battery with the positive
terminal 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
compartment cover 0002into the housing
first and then press to close it.
X Insert mechanical key 0003into the
SmartKey.
X Check the function of all SmartKey buttons
on the vehicle. SmartKey
79Opening and closing Z

Problems with the SmartKey
Problem Possible causes/consequences and
0001 Solutions
You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X
Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the 000Bor
000A button.
If this does not work:
X Check the SmartKey battery (Y page 79) and replace it if
necessary (Y page 79).
X Lock (Y page 83) or unlock (Y page 83) the vehicle using
the mechanical key. The SmartKey is faulty.
X
Lock (Y page 83) or unlock (Y page 83) the vehicle using
the mechanical key.
X Have the SmartKey checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. There is interference from a powerful source of radio waves.
X
Lock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the 000B/000A button. There is a malfunction with KEYLESS-GO.
X
Lock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the 000B/000A button.
X Have KEYLESS-GO checked at a qualified specialist workshop.
If this does not work:
X Check the SmartKey battery (Y page 79) and replace it if
necessary (Y page 79).
X Lock (Y page 83) or unlock (Y page 83) the vehicle using
the mechanical key. You have lost a
SmartKey. X
Have the SmartKey deactivated at a qualified specialist
workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 80
SmartKeyOpening and closing

Problem Possible causes/consequences and
0001 Solutions
The engine cannot be
started using the
SmartKey. 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 302).
or
X Jump-start the vehicle (Y page 306).
or
X Consult a qualified specialist workshop. The engine cannot be
started using the
SmartKey. The steering lock is mechanically blocked.
X
Remove the SmartKey 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 SmartKey is in
the vehicle. Ad
oor is open. Therefore, the SmartKey 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 SmartKey in the ignition lock. Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start the engine.
There is a risk of an accident and injury. When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
G
WARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
You should preferably place luggage or loads
in the cargo compartment. Observe the
loading guidelines (Y page 262). Doors
81Opening and closing Z

X
Take the mechanical key out of the
SmartKey (Y page 78).
X Insert the mechanical key into the trunk lid
lock as far as it will go. X
Turn the mechanical key counter-clockwise
from position 0005as far as it will go to
position 0006.
The trunk is unlocked.
X Turn the mechanical key back to position
0005 and remove it.
X Insert the mechanical key into the
SmartKey.
i When you lock the vehicle (Y page 83),
the trunk is also locked. Trunk emergency release
You can open the trunk lid from inside the
vehicle with the emergency release button. X
Press emergency release button 0002briefly.
The trunk lid unlocks and opens. The trunk lid can be unlocked and opened
with the trunk lid emergency release when
the vehicle is stationary or while driving.
Trunk lid emergency release light:
R
emergency release button 0002flashes for
30 minutes after the trunk lid is opened
R emergency release button 0002flashes for
60 minutes after the trunk lid is closed
The trunk lid emergency release does not
open the trunk lid if the battery is
disconnected or discharged. Side windows
Important safety notes
G
WARNING
While opening the side windows, body parts
could become trapped between the side
window and the door frame as the side
window moves. There is a risk of injury.
Make sure that nobody touches the side
window during the opening procedure. If
somebody becomes trapped, release the
switch or pull the switch to close the side
window again. G
WARNING
While opening the side windows, body parts
in the closing area could become trapped.
There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If
somebody becomes trapped, release the
switch or press the switch down to open the
side window again. G
WARNING
If children operate the side windows they
could become trapped, particularly if they are
left unsupervised. There is a risk of injury.
Activate the override feature for the rear side
windows. When leaving the vehicle, always
take the SmartKey with you and lock the Side windows
87Opening and closing
Z