key battery MERCEDES-BENZ C-Class SEDAN 2013 W204 Owner's Manual

Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshops
see Qualified specialist workshop
AUTO lights
Display message ............................ 227
see Lights
Automatic engine start (ECO start/
stop function) .................................... 146
Automatic engine switch-off (ECO
start/stop function) ..........................145
Automatic headlamp mode ..............111
Automatic transmission Automatic drive program ...............151
Changing gea r............................... 150
Display message ............................ 238
Driving tips .................................... 150
Emergency running mode ..............155
Kickdow n....................................... 150
Manual drive program ....................153
Overview ........................................ 148
Problem (malfunction) ...................155
Progra mselecto rbutton ................ 150
Pulling away ................................... 144
Releasing the parking lock
manually ........................................ 155
Selector leve r................................ 148
Shift range s................................... 152
Starting the engine ........................143
Steering wheel paddle shifters ......151
Transmission position displa y........ 149
Transmissio npositions .................. 149
Automatic transmission
emergency mode ............................... 155 B
Backup lamp Changing bulbs .............................. 120
Display message ............................ 226
Bag hook ............................................ 260
BAS (Brake Assist System) .................65
BAS PLUS (Brake Assist System
PLUS) .................................................... 65
Battery (SmartKey) Checking .......................................... 77
Important safety notes ....................76
Replacing ......................................... 77Battery (vehicle)
Charging ........................................ 300
Display message ............................ 229
Important safety notes ..................298
Jump starting ................................. 302
Blin dSpot Assist
Activating/deactivating .................208
Display message ............................ 232
Notes/function .............................. 186
see Active Blind Spot Assist
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 219
Notes ............................................. 352
Brake lamps
Changing bulbs .............................. 120
Display message ............................ 225
Brakes
ABS .................................................. 64
BAS .................................................. 65
BAS PLUS ........................................ 65
Brake fluid (notes) .........................352
Display message ............................ 217
Driving tips .................................... 162
High-performance brake system ....164
Important safety notes ..................162
Maintenance .................................. 163
Parking brake ................................ 159
Warning lamp ................................. 244
Breakdown
see Flat tire
see Towing away/tow-starting
Bulbs
see Changing bulbs C
California Important notice for retail
customers and lessees ....................23
Calling up a malfunction
see Display messages
Car
see Vehicle
Care
Carpets .......................................... 293
Car wash ........................................ 287 Index
5

Important safety notes
..................347
Refrigerant (air-conditioning
system) .......................................... 354
Washer fluid .................................. .353
Service work
see ASSYST PLUS
Settings
Factory (on-board computer) .........212
On-board computer .......................208
Setting the air distribution ...............133
Setting the airflow ............................134
SETUP (on-board computer) .............213
Side impact air bag .............................45
Side marker lamp (display
message) ............................................ 226
Side windows Cleaning ......................................... 290
Convenience closing feature ............87
Convenience opening feature ..........86
Important safety information ...........85
Opening/closing .............................. 86
Problem (malfunction) .....................88
Resetting ......................................... 88
Sliding sunroof
Important safety notes ....................88
Opening/closing .............................. 89
Problem (malfunction) .....................92
Resetting ......................................... 90
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery .......................77
Changing the programming .............75
Checking the battery .......................77
Convenience closing feature ............87
Convenience opening feature ..........86
Display message ............................ 240
Door central locking/unlocking .......74
Important safety notes ....................74
Loss ................................................. 78
Mechanical key ................................ 76
Positions (ignition lock) .................141
Problem (malfunction) .....................78
Starting the engine ........................143
Snow chains ...................................... 313
Sockets General notes ................................ 265
Rea rcompartmen t......................... 265Spare wheel
Notes/data .................................... 340
Storage location ............................ 343
Specialist workshop ............................ 25
Special seat bel tretractor .................. 61
Speed ,controlling
see Cruise control
Speedometer
Digital ............................................ 202
In the Instrument cluster .................31
Segments ...................................... 199
Selecting the unit of measurement 209
see Instrument cluster
SPORT handling mode
Activating/deactivating (AMG
vehicles) .......................................... 68
Warning lamp ................................. 247
SRS
see SRS (Supplemental Restraint
System)
SRS (Supplemental Restraint
System)
Display message ............................ 220
Introduction ..................................... 41
Warning lamp ................................. 249
Warning lamp (function) ................... 41
Standing lamps
Changing bulbs .............................. 119
Display message ............................ 226
Switching on/off ........................... 112
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 143
Steering (display message) ..............240
Steering wheel Adjusting (electrically). ..................102
Adjusting (manually). .....................102
Button overview ............................... 33
Buttons (on-board computer) ......... 199
Cleaning ......................................... 292
Important safety notes ..................101
Paddle shifters ............................... 151
Storing settings (memory function) 106
Steering wheel paddle shifters ........151
Stopwatch (RACETIMER) ................... 213
Stowage areas ................................... 25616
Index

In particular, the detection of obstacles can
be impaired if:
R dirt on the sensors or anything else
covering the sensors
R snow or heavy rain
R interference by other radars ources
R there are 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
relative to the center of your vehicle G
WARNING
PRE-SAFE ®
Brake does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R when cornering
As a result, PRE-SAFE ®
Brake may neither
give warnings nor intervene in all 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 an appropriate distance
from the vehicle in front and thus prevent a
collision, you must apply the brakes yourself.
X To activate/deactivate: activate or
deactivate PRE-SAFE ®
Brake in the on-
board computer (Y page 207).
When PRE-SAFE ®
Brake is activated, the
0001 symbol appears in the multifunction
display as long as the HOLD function is
deactivated (Y page 176).
On vehicles with Parking Guidance, the
0001 symbol is displayed when position P
is engaged or you are driving faster than
22 mph (35 km/h).
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 system
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.
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 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 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. Theft deterrent locking system
71Safety 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 77) 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 75).
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 71).
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. 76
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 77).
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 76). 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
77Opening 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 77) and replace it if
necessary (Y page 77).
X Lock (Y page 81) or unlock (Y page 81) the vehicle using
the mechanical key. The SmartKey is faulty.
X
Lock (Y page 81) or unlock (Y page 81) 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 77) and replace it if
necessary (Y page 77).
X Lock (Y page 81) or unlock (Y page 81) 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. 78
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 298).
or
X Jump-start the vehicle (Y page 302).
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. Unlocking and opening doors from
the inside
You can open a door from inside the vehicle
even if it has been locked. You can only open
the rear doors from inside the vehicle if they Doors
79Opening and closing Z

X
Press emergency release button 0002briefly.
The trunkl id 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.
Trun klid 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
vehicle. Never leave children unsupervised in
the vehicle. 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. Side window reversing feature
The side windows are equipped with an
automatic reversing feature. If a solid object
blocks or restricts a side window during the
closing process, the side window opens again
automatically .However, the automatic
reversing feature is only an aid and does not Side windows
85Opening and closing Z

0002
To adjust the upper back support
0003 To adjust the contour of the backrest in
the lumbar region
0022 To adjust the lateral structure and support
of the seat
X Make sure that the SmartKey is in position
2in the ignition lock.
i Repeat the adjustmen tifthe seat no
longer has the desired contour after a
certain amount of time. Switching the seat heating on/off
Activating/deactivating G
WARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to excessively high
temperatures may be affected or they may
even suffer burn-like injuries. There is a risk
of injury.
Therefore, do not switch the seat heating on
repeatedly.
The three red indicator lamps in the button
indicate the heating level you have selected.
i If the battery voltage is too low, the seat
heating may switch off. Driver's and front-passenger seat
The system automatically switches down
from level
3to level 2after approximately
eight 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 SmartKey is in position
1or 2in the ignition lock.
X To switch on: press button0002repeatedly
until the desired heating level is set.
X To switch off: press button0002repeatedly
until all the indicator lamps go out. 100
SeatsSeats, steering wheel and mirrors

Problems with the seat heating
Problem Possible causes/consequences and
0001 Solutions
The seat heating has
switched off
prematurely or cannot
be switched on. The on-board 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 defroster or interior lighting. Switching the seat ventilation on/off
Activating/deactivating The three blue indicator lamps in the buttons
indicate the ventilation level you have
selected.
i If the battery voltage is too low, the seat
ventilation may switch off. X
Make sure that the SmartKey is in position
2 in the ignition lock.
X To switch on: press button0002repeatedly
until the desired ventilation level is set.
i You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature (Y page 86). The seat
ventilation of the driver's seat
automatically switches to the highest level.
X To switch off: press button0002repeatedly
until all the indicator lamps go out. Problems with the seat ventilation The seat ventilation has switched off
prematurely 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
defroster or interior lighting. Steering wheel
Important safety notes
G
WARNING
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving, or
driving without the steering wheel adjustment
feature locked could cause the driver to lose
control of the vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. Achild's unsupervised access to a
vehicle could result in an accident and/or
serious personal injury. Steering wheel
101Seats, steering wheel and mirrors Z