key battery MERCEDES-BENZ C-CLASS SALOON 2014 Owners Manual

Automatic transmission emer-
gency running mode
.........................200
Auxiliary heating/ventilation
Important safety notes .................. 172
Problem (display message) ............ 177
Remote control .............................. 173
Setting the departure time ............. 175
Switching on/off (on the centre
console) ......................................... 173
Axle load, permissible (trailer tow-
ing) ...................................................... 480 B
Bag hook ............................................ 374
Ball coupling
Folding in ....................................... 286
Folding out ..................................... 285
BAS (Brake Assist System) ................. 75
BAS PLUS with Cross-Traffic Assist (Brake Assist PLUS with Cross-
Traffic Assist)
Function/notes ................................ 75
Important safety notes .................... 76
Battery (high-voltage)
see High-voltage battery
Battery (key)
Checking .......................................... 94
Important safety notes .................... 93
Replacing ......................................... 94
Battery (vehicle)
Charging ........................................ 416
Display message ............................ 334
Important safety notes .................. 412
Jump starting ................................. 418
Belt
see Seat belts
Belt tensioner
Activation ......................................... 60
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 309
Display message ............................ 339
Notes/function .............................. 259
Trailer towing ................................. 261
see Active Blind Spot Assist
BlueTEC (AdBlue ®
) ............................ .472 BlueTEC
®
Topping up AdBlue ®
....................... 204
Bonnet
Active bonnet (pedestrian protec-tion) ............................................... 390
Closing .......................................... .392
Display message ............................ 347
Important safety notes .................. 390
Opening ......................................... 391
Boot
Emergency release ........................ 105
Important safety notes .................. 101
Locking separately ......................... 105
Opening/closing (automatically
from inside) ................................... 104
Opening/closing (automatically
from outside) ................................. 102
Opening/closing (from the out-
side, HANDS-FREE ACCESS) .......... 103
Opening/closing (manually from
outside) ......................................... 102
Boot lid
Display message ............................ 347
Obstacle recognition ..................... .101
Opening dimensions ..................... .476
Opening/closing ............................ 101
Boot load (maximum) ........................ 476
Box (boot) .......................................... .374
Brake
EBD ................................................. .82
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 322
Notes ............................................. 475
Brake force distribution, elec-
tronic
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive ........................................... 80
Display message ............................ 330
Brake pedal
Pedal resistance/pedal travel .......... 44
Brakes
ABS .................................................. 74
Adaptive Brake Assist ...................... 79 6
Index

Storing and maintaining current
speed ............................................. 217
Cup holder
Centre console .............................. 377
Important safety notes .................. 376
Rear compartment ......................... 378 D
Data see Technical data
Daytime driving lights
Display message ............................ 331
Function/note s............................. 135
Dealership
see Qualified specialist workshop
Declarations of conformity ................. 27
Diagnostics connection ...................... 27
Diesel .................................................. 471
Digital speedometer ......................... 299
Dipped-beam headlamps
Changing bulb s.............................. 143
Display message ............................ 329
Setting for driving abroad (sym-
metrical) ........................................ 134
Setting for driving on the right/
left ................................................. 311
Switching on/of f........................... 135
DIRECT SELECT lever
Automatic transmission ................. 193
Display
Charge status of the high-voltage
battery ........................................... 273
see Display message
see Warning and indicator lamps
Display message
Driving systems ............................. 337
Display messages
ASSYST PLUS ................................ 395
Calling up (on-board computer) ..... 314
Engine ............................................ 333
General information ....................... 314
Hiding (on-board computer) ........... 314
Hybrid system ................................ 337
Introduction ................................... 314
Key ................................................ 350
Lights ............................................. 329
Safety systems .............................. 315 Tyres .............................................. 343
Vehicle ........................................... 345
Distance warning function
Function/note s................................ 77
Distance warning signal (warning
lamp) .................................................. 363
DISTRONIC PLUS
Activating ....................................... 224
Activation conditions ..................... 224
Cruise control lever ....................... 223
Deactivating ................................... 228
Display message ............................ 340
Displays in the multifunction dis-
play ................................................ 228
Driving tips .................................... 229
Function/note s............................. 222
Important safety notes .................. 222
Selecting ........................................ 223
Setting the specified minimum
distance ......................................... 227
Door
Automatic locking (switch) ............... 98
Central locking/unlocking (key) ...... 91
Control panel ................................... 40
Display message ............................ 347
Emergency locking ........................ 100
Emergency unlocking ....................... 98
Important safety notes .................... 96
Opening (from the inside) ................ 97
Drive program
Display (DIRECT SELECT lever) ...... 195
Manual transmission ...................... 192
Drive programs
Automatic transmission ................. 197
Driver's door
see Door
Driving abroad
Mercedes-Benz Service ................. 396
Symmetrical dipped beam ............. 134
Driving Assistance package ............. 263
Driving on flooded roads .................. 215
Driving safety system
BAS PLUS with Cross-Traffic
Assist ............................................... 75
COLLISION PREVENTION ASSIST
PLUS ................................................ 77
EBD (electronic brake force distri-bution) ............................................. 82 Index
9

Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency
Automatic measures after an acci-
dent ................................................ .63
Emergency key
Unlocking the driver's door .............. 98
Emergency key element
Function/notes ................................ 93
Inserting .......................................... 93
Locking vehicle .............................. 100
Removing ........................................ .93
Emergency release
Driver's door .................................... 98
Emergency spare wheel
General notes ................................ 461
Important safety notes .................. 461
Inflating the collapsible spare
wheel ............................................ .462
Technical data ............................... 464
Emergency unlocking
Vehicle ............................................. 98
Energy flow display ........................... 273
Engine
Display message ............................ 333
ECO start/stop function ................ 186
Engine number ............................... 468
Jump-starting ................................. 418
Running irregularl y......................... 189
Starting problems .......................... 189
Starting the engine with the key .... 183
Starting with the Start/Stop but-
ton ................................................. 184
Stopping ........................................ 208
Tow-starting (vehicle) ..................... 424
Warning lamp (engine diagnos-
tics) ............................................... 360
Engine electronics
Notes ............................................. 466
Problem (fault) ............................... 189
Engine oil
Additives ........................................ 474
Checking the oil level ..................... 392
Checking the oil level using the
dipstick .......................................... 392
Display message ............................ 335
Filling capacity ............................... 474
Notes about oil grade s................... 473 Notes on oil level/consumption .... 392
Topping up ..................................... 392
Viscosity ........................................ 474
Environmental protection
Returning an end-of-life vehicle ....... 24
ESP ®
(Electronic Stability Pro-
gram)
Activating/deactivating ................... 81
Characteristics ................................. 81
Deactivating/activating ................. 307
Display message ............................ 315
ETS/4ETS ........................................ 80
Function/note s................................ 80
General notes .................................. 80
Important safety guidelines ............. 80
Trailer stabilisation .......................... 82
Warning lamp ................................. 357
ETS/4ETS (Electronic Traction Sys-
tem) ...................................................... 80
Exhaust
see Exhaust pipe
Exhaust pipe
Cleaning ......................................... 402
Exhaustive discharging (high-volt-
age battery) ....................................... 415
Extended overrun mode ................... 280
Exterior lighting
Cleaning ......................................... 400
see Lights
Exterior mirrors
Adjusting ....................................... 128
Anti-dazzle mode (automatic) ........ 129
Folding in/out (automatically )....... 128
Folding in/out (electrically) ........... 128
Out of position (troubleshooting) ... 129
Parking position ............................. 129
Resetting ....................................... 128
Storing settings (memory func-
tion) ............................................... 131 F
Fault message see Display messages
Features ............................................. 376
Filler cap
see Fuel filler flap
Fire extinguisher ............................... 407 Index
11

Important safety notes .................. 295
Setting the position ....................... 310
Storing settings (memory func-
tion) ............................................... 131
Switching on or off .........................2 96
Switching the display on/off ......... 310
Headlamp
Cleaning system (notes) ................ 476
Headlamp flasher .............................. 137
Headlamps
Misting up ...................................... 140
see Automatic headlamp mode
Heating
see Climate control
High-pressure cleaners .................... 398
High-voltage battery
Charge leve l................................... 273
Charging ........................................ 416
Charging (on-board computer) ....... 274
General notes .................................. 43
Vehicle fire ....................................... 43
Hill start assist .................................. 185
HOLD function
Activating ....................................... 233
Deactivating ................................... 233
Display message ............................ 340
Function/note s............................. 232
Horn ...................................................... 32
Hybrid drive
Displaying the total range .............. 276
Generated electrical energy ........... 276
Hybrid operation
AGILITY SELECT switch .................. 277
Automatic engine start (ECO
Start/Stop function) ...................... 280
Automatic engine switch-off (ECO
start/stop function) ....................... 280
Driving tips .................................... 278
ECO start/stop function ................ 279
Energy flow display ........................ 273
Extended overrun mod e................. 280
Fuel consumption .......................... 276
General notes ................................ 269
Important safety notes .................. 269
Manual gearshifting ....................... 278
Noiseless start ............................... 277
Operating (on-board computer) ..... 273
Overrun mode ................................ 280 Overview (instrument cluster) ........ 272
Power display (electric motor) ....... 272
Problems ....................................... 282
Pulling away ................................... 277
RBS (Recuperative Brake Sys-
tem) ............................................... 269
Resetting values (Audio 20) ........... 276
Resetting values (COMAND
Online) ........................................... 276
Starting the engine ........................ 276
Hybrid system
Automatic deactivation .................... 42
Danger of electric shock .................. 42
Display message ............................ 337
High-voltage battery ........................ 43
Important safety notes .................... 42
Manual deactivation ......................... 43
Opening the bonnet ......................... 44
Overview ........................................ 271
Problems (malfunctions) ................ 282
READY indicator ............................. 276
Warning lamp ................................. 362
Hybrid vehicle
Climate control (THERMATIC) ........ 153
Climate control
(THERMOTRONIC) .......................... 156
Hybrid vehicles
Important safety notes .................... 42 I
Ignition lock see Key positions
Immobiliser .......................................... 85
Indicator and warning lamp
Restraint system ............................ 359
Indicator and warning lamps
COLLISION PREVENTION ASSIST
PLUS .............................................. 363
Coolant .......................................... 360
Engine diagnostics ......................... 360
Indicator lamps
Display message ............................ 330
see Warning and indicator lamps
Indicators
see Turn signals
Insect protection on the radiator .... 392 Index
13

Instrument cluster
Overview .......................................... 34
Power display ................................ 272
Warning and indicator lamps .......... .35
Instrument cluster lighting .............. 292
Intelligent Light System
Activating/deactivating ................ .311
Display message ............................ 331
Overview ........................................ 138
Setting the dipped-beam head-
lamps for driving on the right/left .. 311
Interior lighting
Control .......................................... .141
Emergency lighting ........................ 141
Overview ........................................ 140
Reading lamp ................................. 140
Interior motion sensor
Deactivating ..................................... 87
Function .......................................... .86
Priming ............................................ 86
Switching off .................................... 87
Internal combustion engine
Malfunction .................................... 282
ISOFIX child seat securing system ....65J
Jack Storage location ............................4 07
Using ............................................. 439
Jump starting (engine) ......................418 K
Key Changing the battery ....................... 94
Checking the battery ....................... 94
Convenience closing feature .......... 108
Convenience opening feature ....... .107
Display message ............................ 350
Door central locking/unlocking ....... 91
Emergency key element ................... 93
Important safety notes .................... 90
KEYLESS-GO start function .............. 92
Loss ................................................. 95
Modifying the programming ............. 92
Overview .......................................... 90
Positions (ignition lock) ................. 181 Problem (malfunction) ..................... 95
Starting the engine ........................ 183
Key positions
Key ................................................ 181
Start/Stop button .......................... 181
KEYLESS-GO
Convenience closing ..................... .108
Deactivation ..................................... 91
Locking ............................................ 91
Removing the Start/Stop button ... 182
Unlocking ......................................... 91
Kickdown
Driving tips ................................... .196
Kneebag ............................................... 53 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 309
Display message ............................ 338
Function/informatio n.................... 261
see Active Lane Keeping Assist
Lane package ..................................... 259
Lashing eyelets ................................. 373
Licence plate lamp (display mes-
sage) ................................................... 331
Light sensor (display message) ....... 332
Lighting
see Lights
Lights
Activating/deactivating the Intel-
ligent Light System ........................ 311
Active light function ....................... 138
Adaptive Highbeam Assist PLUS .... 139
Automatic headlamp mode ............ 135
Cornering light function ................. 138
Dipped-beam headlamp s............... 135
Driving abroad ............................... 134
Foglamps (extended range) ........... 139
Hazard warning lamps ................... 137
Headlamp flashe r........................... 137
Headlamp range ............................ 136
Intelligent Light System (func-
tion) ............................................... 138
Light switch ................................... 134 14
Index

Have the restraint system checked and
repaired immediately at a qualified specialist
workshop. After an accident, immediately
switch the ignition off and remove the key
from the ignition lock.
If components of the restraint system are
activated during an accident, the hybrid sys-
tem is automatically deactivated.
The hybrid system is not activated when the
vehicle is started if:
R a short circuit is detected in the hybrid sys-
tem.
R a hybrid system electrical connection is
disconnected.
This ensures that you do not come into con-
tact with high voltage.
Manual deactivation of the hybrid sys-
tem The hybrid system can be deactivated man-
ually using the high voltage switch-off device.
! To prevent damage to the hybrid system
please observe the following instructions:
R only deactivate the hybrid system man-
ually in the following situations.
R work on the hybrid system may only be
carried out at a qualified specialist work-
shop, even when it has been deactivated
manually.
R if the 6 restraint system warning lamp
in the instrument cluster lights up after an
accident.
R if the vehicle is badly damaged, e.g. after an
accident, and the restraint system compo-
nents were not activated.
R if the vehicle is badly damaged and has to
be towed or transported.
X If possible, move the vehicle out of the
danger zone: shift the automatic transmis-
sion into position N.
X Release the electric parking brake.
X Roll the vehicle to a safe place and park it
safely. Get assistance from others if necessary.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning. There is therefore a risk of being
locked out if the vehicle is being pushed or
tested on a dynamometer.
X Switch the ignition off.
X Shift the automatic transmission to park
position P.
Apply the electric parking brake
(Y page 209).
Secure the vehicle to prevent it from rolling
away (Y page 439).
X To use the high-voltage switch-off
device: open the bonnet. X
Press release clip :in the direction of the
arrow and pull it out.
X Pull high voltage switch-off device ;apart
until it engages in the stop position.
High-voltage battery G
WARNING
In the event of a vehicle fire, the internal pres- sure of the high-voltage battery could exceeda critical value. In this case, flammable gas
escapes through a vent valve in the vehicle's
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger area immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements. Hybrid vehicles
43Safety Z

G
WARNING
If the housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. These are poisonous and caustic.
There is a risk of injury.
Avoid contact with the skin, eyes or clothing. Immediately rinse electrolyte splashes off
with water and seek medical attention
straight away.
! Exhaustive discharge caused by the vehi-
cle standing idle for lengthy periods can
damage the high-voltage battery.
If the vehicle is idle for lengthy periods, run
it for a few minutes once every six weeks to
charge up the high-voltage battery.
During the charging process, switch off all
electrical consumers, e.g. the automatic
climate control or the seat heating.
Information on charging the high-voltage bat-
tery (Y page 416).
Engine compartment Before opening the bonnet:
X Apply the electric parking brake.
X Shift the automatic transmission to park
position P.
X Switch the ignition off.
X Remove the key from the ignition lock.
or, in vehicles with KEYLESS-GO start-func-
tion or KEYLESS ‑GO
X Remove the Start/Stop button from the
ignition lock.
X Observe the warning notes on the risk of
electric shock (Y page 42).
X Observe the warning notes about the bon-
net (Y page 391). RBS driving safety system (Recupera-
tive Brake System)
RBS supports you when braking with an elec-
tronically-controlled brake boost mode and enables the recovery of kinetic energy (recu-
peration).
For further information on the RBS system
(Y page 269). Panic alarm
X
To activate: press!button :for
approximately one second.
An alarm sounds and the exterior lighting
flashes.
X To deactivate: press!button :
again.
or
X Insert the key into the ignition lock.
or, in vehicles with KEYLESS-GO start-func-
tion or KEYLESS ‑GO
X Press the Start/Stop button.
The key must be in the vehicle.
The panic alarm function is only available in
certain countries. Occupant safety
Introduction to the restraint system
The restraint system reduces the risk of vehi- cle occupants coming into contact with parts
of the vehicle's interior in the event of an
accident. The restraint system can also
reduce the forces to which vehicle occupants
are subjected during an accident. 44
Occupant safetySafety

R
when the external door handles are
touched
R during convenience closing X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face :or;.
Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
For further information on the convenience closing feature (Y page 107).
X To unlock the boot lid: pull the boot lid
handle.
Deactivating If you do not intend to use the vehicle for a
longer period of time, you can deactivate KEY- LESS-GO. The key will then use very little
power, thereby conserving battery power. For
the purposes of activation/deactivation, the
vehicle must not be nearby.
X To deactivate: press the&button on
the key twice in rapid succession.
The battery check lamp of the key lights up
twice briefly and KEYLESS-GO is deactiva-
ted.
X To activate: press any button on the key or
insert the key into the ignition lock.
KEYLESS-GO and all of its associated fea-
tures are available again. KEYLESS-GO start function
Bear in mind that the engine can be started by any of the vehicle occupants if there is a key
in the vehicle. Changing the settings of the locking
system
You can change the settings of the locking
system. This means that only the driver's door and the fuel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel alone.
X To change the setting: press and hold
down the %and& buttons simulta-
neously for about six seconds until the bat- tery indicator lamp flashes twice
(Y page 94).
If the setting of the locking system is changed
within the signal range of the vehicle, press-
ing the &or% button:
R locks or
R unlocks the vehicle
The key now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button.
The KEYLESS-GO function is changed as fol-
lows:
X To unlock the driver's door: touch the
inner surface of the door handle on the
driver's door.
X To unlock centrally: touch the inner sur-
face of the door handle on the front-
passenger door or the rear door.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press
and hold down the %and& buttons
simultaneously for approximately six sec- 92
KeyOpening and closing

onds until the battery check lamp flashes
twice (Y
page 94). Emergency key element
General notes If the vehicle can no longer be locked or
unlocked with the key or KEYLESS-GO, use
the emergency key element.
If you use the emergency key element to
unlock and open the driver's door, the anti-
theft alarm system will be triggered. Switch
off the alarm (Y page 85).
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the
key into the ignition lock.
Removing the emergency key element X
Push release catch :in the direction of
the arrow and at the same time, remove
emergency key element ;from the key.
Further information about: R unlocking the driver's door (Y page 98)
R unlocking the boot (Y page 105)
R locking the vehicle (Y page 100)
Inserting the emergency key element X
Push emergency key element ;com-
pletely into the key until it engages and release catch
:is back in its basic posi-
tion. Battery of the key
Important safety notes G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in anenvironmentally responsible
recycling system. Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used batter-
ies.
Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist workshop. Key
93Opening and closing Z

Checking the battery
X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
X Replace the battery (Y page 94).
If the key battery is checked within the signal reception range of the vehicle, pressing the
& or% button:
R locks or
R unlocks the vehicle
i You can obtain a battery from any quali-
fied specialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X Take the emergency key element out of the
key (Y page 93). X
Press emergency key element ;into the
opening in the key in the direction of the
arrow until battery compartment cover :opens. When doing so, do not hold battery
compartment cover
:shut.
X Remove battery compartment cover :. 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 of lint, grease and other contamina-
tion.
X Insert the front tabs of battery compart-
ment cover :into the housing and then
press to close it.
X Insert emergency key element ;into the
key.
X Check the function of all key buttons on the
vehicle. 94
KeyOpening and closing