key battery MERCEDES-BENZ C-CLASS COUPE 2011 Owners Manual

B
Bag hook ............................................ 287
Ball coupling Folding in ....................................... 202
Folding out ..................................... 201
BAS (Brake Assist System) .................66
Basic settings see Settings
BAS PLUS (Brake Assist System
PLUS) .................................................... 66
Battery (key) Checking .......................................... 81
Important safety notes ....................80
Replacing ......................................... 81
Battery (vehicle)
Charging ........................................ 328
Connecting .................................... 327
Disconnecting ................................ 327
Display message (12-button mul-
tifunctio nsteering wheel) ..............255
Display message (4-button multi-
function steering wheel) ................252
Important safety notes ..................325
Jump starting ................................. 329
Location ......................................... 326
Removing/fitting ........................... 327
Belt
see Seat belt
Belt force limiters (activation) ...........45
Belt tensioner Activation ......................................... 45
Function .......................................... .54
Blind Spo tAssist
Activating/deactivating .................222
Display message (12-button mul-
tifunctio nsteering wheel) ..............259
Notes/function .............................. 190
Trailer towing ................................. 192
see Active Blind Spot Assist
Bonnet
Active bonnet (pedestrian protec-
tion) ............................................... 300
Closing .......................................... .302
Display message (12-button mul-
tifunctio nsteering wheel) ..............268Display message (4-button multi-
function steering wheel)
................266
Opening ......................................... 301
Boot
Emergency release ..........................87
Important safety guidelines .............85
Locking separatel y........................... 87
Opening (automatically from
inside) .............................................. 87
Opening (automatically from out-
side) ................................................ .86
Boo tlid
Display message (12-button mul-
tifunction steering wheel) ..............268
Display message (4-button multi-
function steering wheel) ................266
Opening/closing .............................. 85
Opening dimensions ......................360
Boot load (maximum)
see Technical data
Brake Assist System
see BAS (Brake Assist System)
Brake fluid
Display message (12-button mul-
tifunctio nsteering wheel) ..............241
Display message (4-button multi-
function steering wheel) ................236
Notes ............................................. 356
Brake lamp
Display message (12-button mul-
tifunctio nsteering wheel) ..............249
Display message (4-button multi-
function steering wheel) ................245
Brake lamps
Adaptive .......................................... .67
Changin gbulbs .............................. 118
Brakes
ABS .................................................. 65
BAS .................................................. 66
BAS PLUS ........................................ 66
Brake fluid (notes) .........................356
Display message (12-button mul-
tifunctio nsteering wheel) ..............238
Display message (4-button multi-
function steering wheel) ................234
Driving tips .................................... 159
High-performance brake system ....161
Important safety notes ..................1596
Index

H
Handbrake see Parking brake
Hazard warning lamps ......................111
Headlamp Cleaning system (function) ............110
Headlamps
Misting up ...................................... 113
Topping up the cleaning system ....304
see Automatic headlamp mode
Head restraints
Adjusting ......................................... 98
Adjusting (electrically). ....................99
Adjusting (manually). .......................98
see NECK-PR Ohead restraints
Heating
see Climate control
High-pressure cleaners ....................307
Hill start assist .................................. 140
HOLD function Display message (12-button mul-
tifunctio nsteering wheel) ..............257
Display message (4-button multi-
function steering wheel) ................256
Function/notes ............................. 177 I
Ignition lock see Key positions
Immobiliser .......................................... 73
Indicator and warning lamps Coolant .......................................... 280
DISTRONI CPLUS ........................... 282
Engine diagnostics .........................280
Fuel tank ........................................ 280
Overview (12-button multifunc-
tion steering wheel) .........................37
Overview (4-button multifunction
steering wheel) ................................ 34
SPORT handling mode ...................278
Indicator lamps
see Warning and indicator lamps
Indicators
see Turn signals Instrument cluster (12-button mul-
tifunction steering wheel)
Indicator and warning lamps ............37
Overview .......................................... 35
Settings ......................................... 223
Instrument cluster (4-button mul-
tifunction steering wheel) Indicator and warning lamps ............34
Overview .......................................... 32
Instrument cluster lighting
Multifunctio nsteering wheel with
12 buttons ....................................... 35
Multifunctio nsteering wheel with
4b utton s......................................... 32
Instrument lighting
see Instrument cluster lighting
Intelligen tLight System
Activating/deactivatin g(12-but-
ton multifunctio nsteering wheel) ..224
Display message (12-button mul-
tifunctio nsteering wheel) ..............250
Setting the dipped-bea mhead-
lamps for driving on the right/left .224
Interior lighting
Automatic control system ..............114
Delayed switch-off (12-button
multifunctio nsteering wheel) ........225
Emergency lighting ........................114
Manual control ............................... 114
Overview ........................................ 114
Reading lamp ................................. 114
see Interior lighting
Interior motion sensor ........................74
ISOFIX child seat securing system ....58 J
Jack Storage location ............................ 315
Using ............................................. 322
Jump starting (engine) ......................329 K
Key Changing the battery .......................81
Checking the battery .......................81
Convenience closing feature ............89 Index
13

Leaving parked up
.........................159
Locking (in an emergency) ...............85
Locking (key )................................... 78
Lowering ........................................ 324
Pulling away ................................... 139
Raising ........................................... 322
Registration ..................................... 26
Towing away .................................. 330
Tow-starting ................................... 330
Transporting .................................. 332
Unlocking (in an emergency) ...........85
Unlocking (key )................................ 78
Vehicle battery
see Battery (vehicle)
Vehicle data
see Technical data
Vehicle dimensions
see Technical data
Vehicle emergency locking ................85
Vehicle identification number see VIN
Vehicle identification plate ..............352
Vehicle tool kit .................................. 315
Vehicle weights see Technical data
Vents
see Air vents
Video (DVD) ........................................ 218
Video DVD (12-button multifunc-
tion steering wheel) ..........................218
VIN ...................................................... 352W
Warning and indicator lamps ABS ................................................ 275
Brakes ........................................... 275
Distance warning signa l................. 282
ESP ®
.............................................. 277
ESP ®
OFF ....................................... 277
LIM (cruise control) ........................ 162
LIM (DISTRONIC PLUS) ..................166
LIM (variable SPEEDTRONIC) .........174
PASSENGER AIRBAG OFF ................57
Reserve fuel ................................... 280
Seat bel t........................................ 273SRS ................................................ 279
Tyr ep ressure monitor ...................282
Warning triangle ................................ 314
Washer fluid Display message (4-button multi-
function steering wheel) ................267
see Windscreen washer system
Weight
see Technical data
Wheel bol ttightening torque ...........324
Wheel chock ...................................... 321
Wheels Changing/replacing .......................344
Changing awheel .......................... 321
Checking ........................................ 336
Cleaning ......................................... 307
Fitting awheel ............................... 323
Important safety notes ..................336
Removing awheel .......................... 323
Storing ........................................... 344
Tightening torque ........................... 324
Whee lsize/tyre size ...................... 345
Windowbag
Display message (12-button mul-
tifunctio nsteering wheel) ..............244
Display message (4-button multi-
function steering wheel) ................237
Operation ........................................ .49
Windows
Cleaning ......................................... 308
see Side windows
Windscreen
Demisting ...................................... 126
Windscreen washe rfluid
Display message (12-button mul-
tifunction steering wheel) ..............269
Windscreen washe rsystem ............. 304
Windscreen wipers Problem (malfunction) ...................120
Replacing the wiper blades ............119
Switching on/off ........................... 118
Winter operation
Important safety notes ..................337
Slippery road surfaces ...................162
Snow chains .................................. 338 Index
23

You can also set an audible signal to confirm
that the vehicle has been locked or unlocked.
The audible signal can be activated and deac-
tivated using the on-board computer
(Y page 226).
X To unlock centrally: press the%but-
ton.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle is locked again.
R the anti-theft system is primed again.
X To lock centrally: press the&button. KEYLESS-GO
You can start, lock or unloc kthe vehicle using
KEYLESS-GO. To do this, you only need carry
the key with you. When you touch the surface
of the sensors on the vehicle's outside door
handles, KEYLESS-GO establishes a radio
connection between the vehicle and the key.
When the engine is started and whilst you are
driving, KEYLESS-GO also checks whether a
valid key is in the vehicle by periodically
establishing radio contact.
When locking or unlocking with KEYLESS-GO,
the distance between the key and the door
handle you wish to lock or unlock must not
be greater than 1 m. X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face :.
X Convenience closing feature: touch
recessed sensor surface ;for an exten-
ded period (Y page 89).
If you pull on the handle of the boot lid, only
the boot of the vehicle is unlocked. Changing the settings of the locking
system
You can change the settingoft he 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.
X To change the setting: press and hold
down the %and& buttons simulta-
neously for approximately six seconds until
the battery check lamp (Y page 81)
flashes twice.
i If the setting of the locking system is
changed within the signal range of the vehi-
cle, pressing the &or% button locks
or 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 front-passenger door handle.
X To lock centrally: touch the outer sensor
surface on one of the door handles. Key
79Opening and closing Z

Restoring the factory settings
X Press the %and& buttons simulta-
neously for approximately six seconds until
the battery check lamp flashes twice. Emergenc
ykey 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 emergency key element to
unlock and open the driver's door or the boot
lid, the anti-thef talarm system will be trig-
gered (Y page 73).
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 in the ignition lock. Removing the emergency key element X
Push release catch :in the direction of
the arrow and at the same time, remove
emergency key element ;from the key. Key battery
Important safety notes It is advisable to have batteries replaced at a
qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre.
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, visi tadoctor
immediately. H
Environmental note Batteries contain pollutants.
It is against the law to dis-
pose of them with the house-
hold rubbish. They must be
collected separately and
recycled in an environmen-
tally responsible manner. Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop, e.g. a
Mercedes-Benz Service
Centre, or to a special col-80
KeyOpening and closing

lection point for old batter-
ies.
Checking the battery X
Press the &or% button.
The key battery is working properly if bat-
tery check lamp :lights up briefly.
If battery check lamp :does not light up
briefly during the test, the key battery is dis-
charged.
X Changing the battery (Y page 81)
i If the key battery is checked within the
signal receptio nrange of the vehicle, press-
ing the &or% button locks or
unlocks the vehicle.
Changing the battery You require a CR 2025 3 V cell battery.
X Take the emergency key elemen tout of the
key (Y page 80). X
Press emergency key element ;into the
opening in the key in the direction of the
arrow until battery tray cover :opens.
When doing so, do no thold cover :shut.
X Remove battery tray cover :. X
Repeatedly tap the key against your palm
until battery =falls out.
X Insert the 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 tray
cover :and then press to close it.
X Insert the emergency key element into the
key.
X Check the function of all key buttons on the
vehicle. Key
81Opening and closing Z

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 %/&button.
If this does not work:
X Check the key battery and replace it if necessary (Y page 81).
X Lock (Y page 85) or unlock (Y page 85) the vehicle using
the emergency key element. The key is faulty.
X
Lock (Y page 85) or unlock (Y page 85) 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. 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 and replace it if necessary (Y page 81).
X Lock (Y page 85) or unlock (Y page 85) the vehicle using
the emergency key element. You have lost a key. X
Have the key cancelled at a Mercedes-Benz Service Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 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. 82
KeyOpening and closing

Problem Possible causes/consequences and
M Solutions
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 325).
or
X Jump-start the vehicle (Y page 329).
or
X Consult a qualified specialist workshop. 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, the double lock
function is activated 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 in need of special assistance if
the vehicle has been locked with the key. As
a result, they may not be able to free them-
selves in the event of an emergency. As a
result, they could be seriously or even fatally
injured by prolonged exposure to extremely
high or low temperatures, for example. In this
case, rescuing people from outside the vehi-
cle is difficult. Deactivate the interior motion sensor before
you lock the vehicle with the key. The doors
can then be opened from the inside after the
vehicle has been locked from the outside with
the key.
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
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Always take the key with you
when leaving the vehicle, even if you are only
leaving it for a short time. Doors
83Opening and closing Z

:
To raise the backrest contour
; To soften the backrest contour
= To lower the backrest contour
? To harden the backrest contour Switching the seat heating on/off
Switching on/off G
WARNING
Repeatedly setting the seat heating to level
3 may result in excessiv eseat temperatures.
The health of passengers that have limited
temperature sensitivity or a limited ability to
react to excessively high temperatures may
be affected or they may even suffer burn-like
injuries. Therefore, do not use seat heating
level 3repeatedly.
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 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.
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 which you
do not need, such as the rear window heat-
ing 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.
i
If the battery voltage is too low, the seat
ventilation may switch off. 100
SeatsSeats, steering wheel and mirrors

i
Make sure that the exterior mirrors are
always folded out fully while the vehicle is
in motion, as they may 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 228).
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 228):
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 The mirrors do not fold out if they have
been folded in manually.
Exterior mirror 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 the mirror-folding but-
ton (Y page 103) repeatedly until you hear
the mirror engage in position.
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
(Y page 103). 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 ignition is switched on and
incident light from headlamps strikes the sen-
sor in the rear-view mirror.
The mirrors do not go into anti-dazzle mode if
reverse gear is engaged. Parking position for the exterior mir-
ror on the front-passenger side
Setting and storing the parking position You can position the front-passenger side
exterior mirror in such a way that you can see
the rear wheel on that side as soon as you
engage reverse gear. You can store this posi-
tion.
X
Make sure that the vehicle is stationary and
that the key is in position 2in the ignition
lock.
X Press button ;for the exterior mirror on
the front-passenger side. 104
MirrorsSeats, steering wheel and mirrors