check engine light MERCEDES-BENZ CLA 2014 Owners Manual

Audio system
see separate operating instructions
Authorized Centers
see Qualified specialist workshop
Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshops
see Qualified specialist workshop
AUTO lights
Display message............................226
see Lights
Automatic engine start (ECO start/
stop function)....................................140
Automatic engine switch-off (ECO
start/stop function)..........................139
Automatic headlamp mode..............105
Automatic transmission
Automatic drive program...............147
Changing gear...............................145
DIRECT SELECT lever.....................142
Display message............................236
Drive program display....................143
Driving tips....................................145
Emergency running mode..............151
Engaging drive position .................. 144
Engaging neutral............................144
Engaging parkposition (AMG
vehicles)........................................145
Engaging reversegear...................143
Engaging the parkposition............143
Holding the vehicle stationary on
uphill gradients..............................145
Kickdown.......................................146
Manual drive program....................148
Overview........................................142
Problem (malfunction)...................151
Programselectorbutton................146
Pulling away...................................138
Selector lever................................144
Starting the engine........................138
Steering wheel paddle shifters......147
Transmission position display143, 144
Transmissionpositions..................145
Automatic transmission
emergency mode............................... 151
B
Backup lamp
Changing bulbs..............................114
Display message............................225
BAS (Brake Assist System).................62
Battery (SmartKey)
Checking .......................................... 74
Important safety notes....................74
Replacing.........................................74
Battery (vehicle)
Charging........................................302
Display message............................228
Important safety notes..................299
Jump starting.................................303
Belt force limiter
Activation ......................................... 53
Function ...........................................53
Blind SpotAssist
Activating/deactivating.................205
Display message............................231
Notes/function..............................188
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message............................219
Notes.............................................348
Brake lamps
Changing bulbs..............................114
Display message............................224
Brakes
ABS..................................................61
Adaptive Brake Assist......................63
BAS..................................................62
Brake fluid (notes).........................348
Display message............................213
Driving tips....................................158
Important safety notes..................158
Maintenance..................................159
Parking brake................................154
Warning lamp ................................. 242
Breakdown
see Flat tire
see Towing away/tow-starting
Bulbs
see Replacing bulbs
Index5

Switching the rearwindow
defroster on/off............................130
Switching the ZONE function on/
off..................................................128
Cockpit
Overview..........................................28
see Instrument cluster
COLLISIONPREVENTION ASSIST
Activating/deactivating the
distance warning function .............. 204
Displaymessage............................213
Operation/notes..............................62
COLLISIONPREVENTION ASSIST
PLUS
Activating/deactivating.................204
Operation/notes..............................64
COMAND
see separate operating instructions
Combination switch..........................106
Compass
Calibrating.....................................276
Calling up ....................................... 276
Setting...........................................276
Consumption statistics (on-board
computer)..........................................197
Convenience closing feature..............84
Convenience opening feature............84
Coolant(engine)
Checkingthe level.........................283
Display message............................227
Filling capacity...............................350
Important safety notes..................349
Temperature (on-board computer).209
Temperature gauge ........................ 194
Warning lamp ................................. 248
Cooling
see Climate control
Copyright.............................................26
Cornering light function
Changing bulbs..............................113
Display message............................223
Function/notes.............................107
Crash-responsive emergency
lighting...............................................111
Cruise control
Activationconditions.....................163
Cruise control lever.......................162
Deactivating ................................... 164
Display message............................233
Driving system...............................162
Function/notes.............................162
Important safety notes..................162
Settingaspeed .............................. 163
Storing and maintaining current
speed ............................................. 163
Cup holder
Centerconsole..............................260
Important safety notes..................260
Rearcompartment.........................261
Customer Assistance Center (CAC)...25
Customer Relations Department.......25
D
Dashboard
see Instrument cluster
Dashboard lighting
see Instrument cluster lighting
Data
see Technical data
Daytime running lamps
Display message............................226
Switching on/off (on-board
computer)......................................206
Switching on/off (switch)..............105
Dealerships
see Qualified specialist workshop
Declarations of conformity................. 24
Delayedswitch-off
Exteriorlighting (on-board
computer)......................................207
Interior lighting..............................208
Diagnostics connection......................25
Digital speedometer.........................198
DIRECT SELECTlever
see Automatic transmission
Display(cleaning instructions)........290
Display messages
ASSYST PLUS................................284
Calling up (on-board computer).....212
Driving systems.............................229
Engine ............................................ 227
General notes................................212
Hiding (on-board computer)...........212
Lights .............................................223
Index7

Fuel ................................................ 157
General..........................................156
Hydroplaning.................................161
Icy road surfaces...........................161
Limited braking efficiency on
salted roads...................................159
Snow chains..................................315
Symmetrical low beam..................104
Wet road surface...........................159
DVD audio (on-board computer)......200
DVD video (on-board computer)......201
E
EASY-VARIO-PLUS system
Cargo compartment enlargement..257
EBD (electronic brake force
distribution)
Display message............................215
Function/notes ................................ 69
ECO display
Function/notes.............................157
On-board computer.......................198
ECO start/stop function
Automatic engine start..................140
Automatic engine switch-off..........139
Deactivating/activating.................140
General information.......................139
Important safety notes..................139
Introduction...................................139
Electronic Stability Program
see ESP®(ElectronicStability Program)
Emergencyrelease
Driver's door....................................79
Trunk...............................................82
Vehicle.............................................79
Emergency Tensioning Devices
Activation ......................................... 39
Function ...........................................53
Safety guidelines.............................40
Emissions control
Service and warranty information....22
Engine
Check Engine warning lamp ........... 248
Display message............................227
ECO start/stop function................139
Engine number ............................... 345
Irregularrunning............................141
Jump-starting.................................303
Starting problems..........................141
Starting the engine with the
SmartKey.......................................138
Switching off..................................154
Tow-starting (vehicle) ..................... 308
Engine, jump starting
see Jump starting (engine)
Engine electronics
Problem (malfunction)...................141
Engine oil
Adding...........................................282
Additives........................................348
Checking the oil level ..................... 281
Checking the oil level using the
dipstick..........................................282
Display message............................228
Filling capacity...............................348
Notes about oil grades ................... 348
Notes on oil level/consumption....281
Temperature (on-board computer).209
Viscosity........................................348
ESP®(Electronic Stability
Program)
AMG menu (on-board computer)...210
Deactivating/activating (AMG
vehicles)..........................................66
Deactivating/activating (except
AMG vehicles)................................203
Deactivating/activating (notes;
except AMG vehicles)......................68
Display message............................213
ETS/4ETS........................................65
Function/notes.........................65, 66
General notes..................................65
Important safety information...........65
Trailer stabilization ........................... 69
Warning lamp ................................. 244
ETS/4ETS (Electronic Traction
System)................................................65
Exhaustcheck...................................157
Exhaustpipe (cleaning instructions)289
Exterior lighting
Settingoptions..............................104
see Lights
Index9

REmergency Tensioning Device for the front
seat belts and the outer seat belts in the
rear
RSeat belt force limiter for the front seat
belts and the outer seat belts in the rear
SRS reduces the risk of vehicle occupants
coming into contact with parts of the
vehicle's interior in the event of an accident.
It can also reduce the forces to which vehicle
occupants are subjected during an accident.
SRS warning lamp
GWARNING
If SRS is malfunctioning, child restraint
systemcomponents may be triggered
unintentionally or might not be triggered at all
in the event of an accident with a high rate of
vehicle deceleration. There is an increased
risk of injury, possibly even fatal.
Have SRS checked and repaired immediately
at a qualified specialist workshop.
SRS functions are checked regularly when
you switch on the ignition and when the
engine is running. Therefore, malfunctions
can be detected in good time.
TheSRS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started.
The SRS components are in operational
readiness when theSRS indicator lamp
goes out while the engine is running.
There is a malfunction if:
RtheSRS warning lamp does not light
up when the ignition is switched on
Rthe engine is running and theSRS
warning lamp does not go out after a few
seconds
Rthe engine is running and theSRS
warning lamp lights up again
Triggering of Emergency Tensioning
Devices and air bags
During the first stage of a collision, the air bag
control unit evaluates important physical
data relating to vehicle deceleration or
acceleration, such as:
Rduration
Rdirection
Rmagnitude
Based on the evaluation of this data, the air
bag control unit pre-emptively triggers the
Emergency Tensioning Device in the first
stage.
If there is an even higher rate of vehicle
deceleration or acceleration in a longitudinal
direction, the front air bags are also deployed.
Your vehicle has adaptive, two-stage front air
bags. The air bag control unit evaluates
vehicle deceleration or acceleration in the
event of a collision. In the first deployment
stage, the front air bag is filled with enough
propellant gas to reduce the risk of injuries.
The front air bag is fully deployed if a second
deployment threshold is reached within a few
milliseconds.
The Emergency Tensioning Device and air bag
triggering thresholds are variable and are
adapted to the detected rate of deceleration
or acceleration of the vehicle. This process is
pre-emptive in nature. The triggering process
must take place in good time at the start of
the collision.
The rate of vehicle deceleration or
acceleration and the direction of the force are
essentially determined by:
Rthe distribution of forces during the
collision
Rthe collision angle
Rthe deformation characteristics of the
vehicle
Rthe characteristics of the object with which
the vehicle has collided
Factors that can only be seen and measured
after a collision has occurred do not play a
Occupant safety39
Safety
Z

ProblemPossible causes/consequences and
Solutions
The engine cannot be
started using the
SmartKey.
The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
(Ypage 299).
or
XJump-start the vehicle (Ypage 303).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the
SmartKey.
The steering lock is mechanically blocked.
XRemove the SmartKey and reinsert it into the ignition lock. While
doing this, turn the steering wheel in both directions.
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park positionP
RStart 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.
GWARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
You should preferably place luggage or loads
in the cargo compartment. Observe the
loading guidelines (Ypage 254).
Unlocking and opening doors from
the inside
iWhen a door is opened, the side window
on that side opens slightly. When the door
is closed, the side window closes again.
!The side windows will not open/close if
the battery is discharged or if the side
windows have iced up. It will then not be
possible to close the door. Do not attempt
to force the door closed. You could
otherwise damage the door or the side
window.
Doors77
Opening and closing
Z

Useful information
iThis Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
iRead the information on qualified
specialist workshops: (Ypage 25).
Correct driver's seat position
GWARNING
You could lose control of your vehicle if you
do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfastenthe seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine.
Observe the safety guidelines on seat
adjustment (Ypage 91).
XMake sure that seat"is adjusted
properly.
Manual seat adjustment (Ypage 92)
Electrical seat adjustment (Ypage 93)
When adjusting the seat, make sure that:
Ryou are as far away from the driver's air
bag as possible.
Ryou are sitting in a normal upright
position.
Ryou can fasten the seat belt properly.
Ryou have moved the backrest to an
almost vertical position.
Ryou have set the seat cushion angle so
that your thighs are gently supported.
Ryou can depress the pedals properly.
XCheck whether the head restraint is
adjusted properly (Ypage 93).
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by
the center of the head restraint.
Observe the safety guidelines on steering
wheel adjustment (Ypage 96).
XMake sure that steering wheelis
adjusted properly.
Adjusting the steering wheel
(Ypage 97)
When adjusting the steering wheel, make
sure that:
Ryou can hold the steering wheel with your
arms slightly bent.
Ryou can move your legs freely.
Ryou can see all the displays in the
instrumentclusterclearly.
Observe the safety guidelines for seat belts
(Ypage 50).
XCheck whether you have fastened seat
beltproperly (Ypage 51).
90Correct driver's seat position
Seats, steering wheel and mirrors

Crash-responsive emergency lighting
The interiorlighting is activated automatically
if the vehicle is involved in an accident.
XTo switch off the crash-responsive
emergency lighting:press the hazard
warning lamp button.
or
XLockand then unlock the vehicle using the
key.
Replacing bulbs
Important safety notes
Xenon bulbs
GDANGER
Xenonbulbs carry a high voltage. You can get
an electric shock if you remove the cover of
the Xenon bulb and touch the electrical
contacts. There is a risk of fatal injury.
Never touch the parts or the electrical
contacts of the Xenon bulb. Always have work
on the Xenon bulbs carried out at a qualified
specialist workshop.
If your vehicle is equipped with Xenon bulbs,
you can recognize this by the following: the
cone of light from the Xenon bulbs moves
from the top to the bottom and back again
when you start the engine. For this to be
observed, the lights must be switched on
before starting the engine.
Bulbs and lamps are an important aspectof
vehicle safety.You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
Other bulbs
GWARNING
Bulbs, lamps and connectors can get very hot
when operating. If you change a bulb, you
could burn yourself on these components.
There is a risk of injury.
Allow these components to cool down before
changing a bulb.
Do not use a bulb that has been dropped or if
its glass tube has been scratched.
The bulb may explode if:
Ryou touch it
Rit is hot
Ryou drop it
Ryou scratch it
Only operate bulbs in enclosed lamps
designed for that purpose. Only install spare
bulbs of the same type and the specified
voltage.
Marks on the glass tube reduce the service
life of the bulbs. Do not touch the glass tube
with your bare hands. If necessary, clean the
glass tube when cold with alcohol or spirit and
rub it off with a lint-free cloth.
Protectbulbs from moisture during
operation.Do not allow bulbs to come into
contact with liquids.
There are bulbs other than the Xenon bulbs
that you cannot replace. Replace only the
bulbs listed (Ypage 111). Have the bulbs that
you cannot replace yourself changed at a
qualified specialist workshop.
If you require assistance changing bulbs,
consult a qualified specialist workshop.
If the new bulb still does not light up, consult
a qualified specialist workshop.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
Overview: changing bulbs/bulb types
You can change the following bulbs. The bulb
type can be found in the legend.
Replacing bulbs111
Lights and windshiel dw ipers
Z

ProblemPossible causes/consequences and
Solutions
The engine is not
running smoothly and
is misfiring.
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
XHave the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it.
The coolant
temperature display is
showing more than
248 ‡ (120 †). The
coolant warning lamp
may also be lit and a
warning tone may
sound.
The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant
to cool down.
XCheck the coolant level (Ypage 283). Observe the warning
notes as you do so and add coolant if necessary.
Automatic transmission
Important safety notes
GWARNING
If the engine speed is above the idling speed
and you engage transmission positionDor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission positionDorR,
always firmly depress the brake pedal and do
not simultaneously accelerate.
GWARNING
The automatic transmission switches to
neutral positionNwhen you switch off the
engine. The vehicle may roll away.There is a
risk of an accident.
After switching off the engine, always switch
to parking positionP. Prevent the parked
vehicle from rolling away by applying the
parking brake.
DIRECTSELECT lever
Overview of transmission positions
All vehicles (exceptAMG vehicles):the
DIRECT SELECT lever is on the right of the
steering column.
For information on the selector lever in AMG
vehicles (Ypage 144).
Park position with parking lock
Reverse gear
Neutral
Drive
iThe DIRECT SELECT leveralways returns
to its original position. The current
transmission positionP,R,NorDappears
142Automatic transmission
Driving and parking

!Overfilling the fuel tank could damage the
fuel system.
!Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
!Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
Do not get into the vehicle againduring the
refueling process. Otherwise, electrostatic
charge could build up again.
If you overfill the fuel tank, fuel could spray
out when the fuel pump nozzle is removed.
Forfurther information on fuel and fuel quality
(Ypage 346).
Refueling
Opening/closing the fuel filler flap
To open the fuel filler flap
Tire pressure table
"To insert the fuel filler cap
!Fuel type to be used
The fuel filler flap is unlocked or locked
automatically when you open or close the
vehicle with the SmartKey.
The position of the fuel filler cap is displayed

in the instrumentcluster.The arrow on
the filling pump indicates the side of the
vehicle.
Opening
XSwitch the engine off.
XRemove the SmartKey from the ignition
lock.
XPress the fuel filler flap in the direction of
arrow.
The fuel filler flap swings up.
XTurn the fuel filler flap counter-clockwise
and remove it.
XInsert the fuel filler cap into holder on the
inside of fuel filler flap".
XCompletely insert the filler neck of the fuel
pump nozzle into the tank, hook in place
and refuel.
XOnly fill the tank until the pump nozzle
switches off.
iDo not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out.
Closing
XReplace the cap on the filler neck and turn
clockwise until it engages audibly.
XClose the fuel filler flap.
iClose the fuel filler flap before locking the
vehicle.
iIf you are driving with the fuel filler cap
open, thereserve fuel warning lamp
flashes.Amessage appears in the
multifunction display (Ypage 228).
In addition, theCheck Engine warning
lamp may light up (Ypage 248).
For further information on warning and
indicator lamps in the instrument cluster,
see (Ypage 248).
152Refueling
Driving and parking

Heavy and light loads
GWARNING
If you rest yourfoot on the brake pedal while
driving, the braking system can overheat. This
increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest.Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately.
Drive on for a short while. This allows the
airflow to cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rain
without braking, there may be a delayed
reaction from the brakes when braking for the
first time. This may also occur after the
vehicle has been washed or driven through
deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the
vehicle washed, brake firmly while paying
attention to the traffic conditions. This will
warm up the brake discs, thereby drying them
more quickly and protecting them against
corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
RBrake occasionally to remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
RCarefully depress the brake pedal and the
beginning and end of a journey.
RMaintain a greater distanceto the vehicle
ahead.
Servicing the brakes
!If the red brake warning lamp lights up in
the instrument cluster and you hear a
warning tone while the engine is running,
the brake fluid level may be too low.
Observe additional warning messages in
the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked
immediately. This work should be carried
out at a qualified specialist workshop.
!A function or performance test should
only be carried out ona2-axle
dynamometer. If you are planning to have
the vehicle tested on such a dynamometer,
contact an authorized Mercedes-Benz
Center to obtain further information first.
Otherwise, you could damage the drive
train or the brake system.
!As the ESP®system operates
automatically, the engine and the ignition
must be switched off (theSmartKey must
be in position0or1in the ignitionlock) if:
Rthe electric parking brake is tested on a
brake dynamometer (for a maximum of
ten seconds)
Rthe vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a
qualified specialist workshop. Consult a
qualified specialist workshop to arrange this.
Driving tips159
Driving and parking
Z