2014 MERCEDES-BENZ C-CLASS SALOON check engine

Controlling automatically ..............
.159
Convenience opening/closing
(air-recirculation mode) ................. 165
Cooling with air dehumidification .. 157
Demisting the windows .................. 163
Demisting the windscreen ............. 163
ECO start/stop function ................ 155
ECO start/stop function
(THERMATIC) ................................. 152
Hybrid vehicle (THERMOTRONIC ).. 155
Hybrid vehicles (THERMATIC )........ 152
Important safety notes .................. 150
Indicator lamp ................................ 159
Information about using
THERMATIC automatic climate
control ........................................... 152
Information on using
THERMOTRONIC automatic cli-
mate control .................................. 155
Ionisation ....................................... 169
Overview of systems ...................... 150
Perfume atomizer .......................... 167
Pre-entry climate control ............... 169
Problem with the rear window
heating .......................................... 165
Problems with cooling with air
dehumidification ............................ 159
Rear control panel ......................... 154
Remote activation of heating/
ventilation systems ........................ 171
Setting the air distribution ............. 161
Setting the air vents ...................... 177
Setting the airflow ......................... 162
Setting the climate mod e............... 160
Setting the temperature ................ 160
Switching air-recirculation mode
on/of f............................................ 165
Switching on/of f........................... 156
Switching residual heat on/off ...... 166
Switching the rear window heat-
ing on/of f...................................... 164
Switching the synchronisation
function on and off ........................ 162
THERMATIC automatic climate
control (2-zone) ............................. 151
THERMOTRONIC (3-zone) auto-
matic climate control ..................... 154 Cockpit
Overview .......................................... 32
Collapsible emergency spare
wheel
see Emergency spare wheel
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 308
Display message ............................ 322
Operation/note s.............................. 77
COMAND display
Cleaning ......................................... 402
Combination switch .......................... 137
Consumption statistics (on-board
computer) .......................................... 299
Convenience box ............................... 374
Convenience closing feature ............ 107
Convenience opening feature .......... 107
Convenience opening/closing (air-
recirculation mode) ........................... 165
Coolant (engine)
Checking the level ......................... 393
Display message ............................ 333
Important safety notes .................. 475
Temperature display in the instru-
ment cluster .................................. 293
Temperature display in the on-
board computer ............................. 307
Warning lamp ................................. 360
Cooling
see Climate control
Copyright ............................................. 29
Cornering light function
Display message ............................ 329
Function/note s............................. 138
Crash-responsive emergency light-
ing ....................................................... 141
Crosswind Assist ................................. 82
Cruise control
Cruise control lever ....................... 216
Deactivating ................................... 218
Display message ............................ 342
Driving system ............................... 216
Important safety notes .................. 216
LIM indicator lamp ......................... 216
Selecting ........................................ 217
Setting a speed .............................. 218 8
Index

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

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

Tow-away protection
Activating ......................................... 86
Deactivating ..................................... 86
Function ........................................... 86
Tow-starting
Emergency engine starting ............ 424
Important safety notes .................. 420
Towing
Important safety notes .................. 420
Notes for 4MATIC vehicles ............ 423
With the rear axle raised ................ 422
Towing a trailer
Active Blind Spot Assist ................. 266
Active Lane Keeping Assist ............ 269
Active Parking Assist ..................... 239
Axle load, permissibl e.................... 480
Bulb failure indicator for LED
lamps ............................................. 287
ESP ®
(Electronic Stability Pro-
gram) ............................................... 82
General notes ................................ 284
Pulling away with a traile r.............. 185
Trailer tow hitch display message .. 347
Towing away
Fitting the towing ey e.................... 422
Removing the towing eye ............... 422
With both axles on the ground ....... 422
Towing eye ......................................... 407
Traffic Sign Assist
Activating ....................................... 257
Activating/deactivating the warn-ing function .................................... 308
Display message ............................ 340
Function/note s............................. 256
Important safety notes .................. 257
Instrument cluster display ............. 257
Trailer coupling
see Towing a trailer
Trailer towing
7-pin connecto r............................. 287
Blind Spot Assist ............................ 261
Cleaning the trailer tow hitch ......... 402
Coupling up a traile r...................... 286
Decoupling a trailer ....................... 286
Driving tips .................................... 284
Folding in the ball coupling ............ 286
Folding out the ball coupling .......... 285
Important safety notes .................. 283 Lights display message .................. 329
Mounting dimensions .................... 477
Parktronic ...................................... 236
Power supply ................................. 287
Problem (fault) ............................... 289
Trailer load
s................................... 478
Transfer case ..................................... 200
Transmission
see Automatic transmission
see Manual transmission
Transmission position display ......... 195
Transmission position display
(DIRECT SELECT lever) ...................... 195
Transporting the vehicle .................. 423
Trim pieces (cleaning instruc-
tions) .................................................. 403
Trip computer (on-board com-
puter) .................................................. 299
Trip meter
Calling up ....................................... 298
Resetting (on-board computer) ...... 299
Turn signals
Changing bulbs (front) ................... 144
Changing bulbs (rear) .................... 144
Switching on/of f........................... 137
TV
Operating (on-board computer) ..... 304
Two-way radio
Frequencies ................................... 466
Installation ..................................... 466
Transmission output (maximum) .... 466
Type identification plate
see Vehicle identification plate
Tyre pressure
Calling up (on-board computer) ..... 433
Display message ............................ 343
Important safety notes .................. 433
Not reached (TIREFIT) .................... 411
Reached (TIREFIT) .......................... 411
Recommended ............................... 432
Tyre pressure loss warning
General notes ................................ 436
Important safety notes .................. 436
Restarting ...................................... 437
Tyre pressure monitor
Checking the tyre pressure elec-
tronically ........................................ 434 Index
21

ried out, this could result in malfunctions or
system failures. There is a risk of an accident.
Always have the prescribed service/mainte-
nance work as well as necessary repairs car-
ried out at a qualified specialist workshop. G
WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with hot parts of the exhaust system. There is a risk of fire.
When driving off road or on unpaved roads,
check the vehicle's underside regularly. In
particular, remove parts of plants or other
flammable materials which have become
trapped. In the case of damage, contact a
qualified specialist workshop. G
WARNING
Modifications to electronic components, their software as well as wiring could affect their
function and/or the operation of other net-
worked components. This could in particular
also be the case for systems relevant to
safety. They might not function properly any-
more and/or jeopardise the operational
safety of the vehicle. There is an increased
risk of an accident and injury.
Do not attempt to modify the wiring as well as
electronic components or their software.
Always have work on electrical and electronic components carried out at a qualified special-
ist workshop.
If you make any changes to the vehicle elec-
tronics, the general operating permit is ren-
dered invalid.
! There is a risk of damage to the vehicle if:
R the vehicle becomes stuck, e.g. on a high
kerb or an unpaved road
R you drive too fast over an obstacle, e.g. a
kerb or a pothole in the road
R a heavy object strikes the underbody or
parts of the chassis In situations like this, the body, the under-
body, chassis parts, wheels or tyres could
be damaged without the damage being visi-
ble. Components damaged in this way can
unexpectedly fail or, in the case of an acci-
dent, no longer withstand the strain they
are designed for.
If the underbody panelling is damaged,
combustible materials such as leaves,
grass or twigs can gather between the
underbody and the underbody panelling. If
these materials come in contact with hot
parts of the exhaust system, they can catch fire.
In such situations, have the vehicle
checked and repaired immediately at a
qualified specialist workshop. If, upon con-
tinuing your journey, you notice that driving
safety is impaired, pull over and stop the
vehicle immediately, paying attention to
road and traffic conditions. In such cases,
consult a qualified specialist workshop.
Hybrid vehicles have a combustion engine
and an electric motor. The voltage supply for
operating the vehicle electrically is provided
by the vehicle's high-voltage electrical sys-
tem. G
DANGER
The vehicle's high voltage electrical system is under high voltage. If you modify components
in the vehicle's high-voltage electrical system or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Do not touch any high-voltage components
after an accident and never modify the vehi-
cle's high-voltage electrical system. Have the vehicle towed away after an accident and the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
The components of the vehicle's high-voltage
electrical system are marked with yellow 26
Introduction

warning stickers. The cables of the vehicle's
high-voltage electrical system are orange.
Vehicles with an electric motor generate sig-
nificantly less noise than vehicles with inter-
nal combustion engines. As a result, in certain situations your vehicle may not be heard by
other road users. This can happen, for exam-
ple, when you are parking and your vehicle is not seen by other road users. This requires
you to adopt a particularly anticipatory driving
style, as it is necessary to allow for the pos-
sibility that other road users may behave
unpredictably. Declarations of conformity
Wireless vehicle components The following information applies to all com-
ponents of the vehicle and the information
systems and communication devices integra-
ted into the vehicle which receive and/or
transmit radio waves:
The components of this vehicle that receive
and/or transmit radio waves are compliant
with the basic requirements and all other rel- evant conditions of Directive 1999/5/E C.
You can obtain further information from any
Mercedes-Benz Service Centre.
Electromagnetic compatibility The electromagnetic compatibility of the vehi-
cle components has been checked and certi-fied according to the currently valid version of
Regulation ECE-R 10. Diagnostics connection
The diagnostics connection is only intended
for the connection of diagnostic equipment at a qualified specialist workshop. G
WARNING
If you connect equipment to a diagnostics
connection in the vehicle, it can affect the
operation of the vehicle systems. This may affect the operating safety of the vehicle.
There is a risk of an accident.
Do not connect any equipment to a diagnos-
tics connection in the vehicle.
G
WARNING
Objects in the driver's footwell may restrict
the clearance around the pedals or block a
depressed pedal. This jeopardises the oper-
ating and road safety of the vehicle. There is a risk of an accident.
Stow all objects securely in the vehicle so that
they do not get into the driver's footwell.
Always fit the floormats securely and as pre-
scribed in order to ensure that there is always sufficient room for the pedals. Do not use
loose floormats and do not place several floor-mats on top of one another.
! If the engine is switched off and equip-
ment on the diagnostics connection is
used, the starter battery may discharge.
Connecting equipment to the diagnostics
connection can lead to emissions monitoring information being reset, for example. This
may lead to the vehicle failing to meet the
requirements of the next emissions test dur-
ing the main inspection. Qualified specialist workshop
A qualified specialist workshop has the nec-
essary special skills, tools and qualifications
to correctly carry out any necessary work on
your vehicle. This particularly applies to work
relevant to safety.
Observe the notes in the Service Booklet.
Always have the following work carried out at a qualified specialist workshop:
R work relevant to safety
R service and maintenance work
R repair work
R modifications, installations and conver-
sions Introduction
27 Z

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos- sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 27). Hybrid vehicles
General notes
Hybrid technology combines a fuel-efficient
internal combustion engine with a powerful
electric motor. Important safety notes
Danger of electric shock G
DANGER
The vehicle's high voltage electrical system is under high voltage. If you modify components
in the vehicle's high-voltage electrical system or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Do not touch any high-voltage components
after an accident and never modify the vehi-
cle's high-voltage electrical system. Have the vehicle towed away after an accident and the vehicle's high-voltage electrical system
checked by a qualified specialist workshop. When towing a vehicle after an accident, be
sure to observe the following sections:
R Transporting the vehicle (Y page 423)
R Towing the vehicle with the rear axle raised
(Y page 422)
R Towing the vehicle with both axles on the
ground (Y page 422)
Read the safety instructions on towing and
tow-starting (Y page 420). All components of the hybrid system are
marked with yellow warning stickers that
warn you of the danger of high voltage. The
cables of the vehicle's high-voltage electrical
system are orange in colour.
The ignition must be switched off when car-
rying out general tasks, such as changing
bulbs or checking the coolant level.
Automatic deactivation of the hybrid
system G
DANGER
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or might not be trig-
gered at all in the event of an accident with a high rate of vehicle deceleration. This can
effect belt tensioners or airbags, for example. In addition, the vehicle's high-voltage electri-
cal system may not be deactivated as inten-
ded in the event of an accident. Touching
damaged components of the vehicle's high-
voltage electrical system could result in an
electric shock. There is an increased risk of
injury, possibly even fatal. 42
Hybrid vehiclesSafety

The restraint system includes the:
R seat belt system
R airbags
R child restraint system
R child seat securing system
The components of the restraint system work
in conjunction with each other. They can only
offer protection if all vehicle occupants
always:
R have the seat belt correctly fastened
(Y page 48)
R have the seat and head restraint adjusted
properly (Y page 119)
As the driver, you must also make sure that
the steering wheel is also adjusted properly.
Observe the information on the correct driv-
er's seat position (Y page 118).
In addition, you must make sure that the air-
bags can inflate properly if they are deployed (Y page 51).
An airbag supplements a correctly worn seat
belt and, as an additional safety device,
increases protection for vehicle occupants in
applicable accident situations. The airbags
are not deployed, for example, in the event of an accident in which sufficient protection is
offered by the seat belt. In addition, only
those airbags, which in the applicable acci-
dent situations offer additional protection,
are deployed in the event of an accident.
However, the seat belt and airbag generally
do not protect against objects penetrating
the vehicle from the outside.
Information on how the restraint system
operates can be found under "Deployment of
belt tensioners and airbags" (Y page 60).
See "Children in the vehicle" for further infor- mation on children travelling in the vehicle as
well as on child restraint systems
(Y page 63). Important safety notes
G
WARNING
If the restraint system is modified, it may no
longer work as intended. The restraint system
may then not perform its intended protective function by failing in an accident or triggering
unexpectedly, for example. There is an
increased risk of injury, possibly even fatal.
Never modify parts of the restraint system. Do not attempt to modify the wiring as well as
electronic components or their software.
If it is necessary to modify an airbag system to
accommodate a person with disabilities, con- tact an authorised Mercedes-Benz Centre. Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at regular intervals while the engine is run-
ning. Therefore, malfunctions can be detec-
ted in good time.
The 6 restraint system warning lamp in
the instrument cluster lights up when the igni- tion is switched on. It goes out no later than afew seconds after the engine is started. The
components of the restraint system are in
operational readiness.
A malfunction has occurred if the 6
restraint system warning lamp:
R does not light up after the ignition is
switched on
R does not go out after a few seconds with
the engine running
R lights up again while the engine is running
All vehicles, except hybrid vehicles: G
WARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or might not be trig-
gered at all in the event of an accident with a high rate of vehicle deceleration. This can
effect belt tensioners or airbags, for example. Occupant safety
45Safety
Z