ignition MERCEDES-BENZ CLA 2014 Service Manual

XTurn the SmartKey to position0in the
ignition lock or remove it (Ypage 137).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
iResidual heat is deactivated
automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Setting the air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air
outlets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet between the windshield
and the hood free of blockages, such as ice,
snow or leaves.
Rnever cover the air vents or air intake grilles
in the vehicle interior.
iYou can move the adjusters for the air
vents vertically or horizontally to set the
direction of the airflow.
iFor optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position.
Setting the center air vents
XTo open the center air vent:turn the
adjuster in one of center air vents
counter-clockwise.
XTo close the center air vent:turn the
adjuster in one of center air vents
clockwise until it engages.
Setting the side air vents
Side window defroster vent
Side air vent
XTo openaside air vent:turn the adjuster
in side air ventcounter-clockwise.
XTo closeaside air vent:turn the adjuster
in side air ventclockwise until it
engages.
132Setting the air vents
Climate control

GWARNING
If you switch off the ignitionwhile driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect.You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
GWARNING
If the parking brake has not been fully
released when driving, the parking brake can:
Roverheat and cause a fire
Rlose its hold function.
There is a risk of fire and an accident.Release
the parking brake fully before driving off.
!Warm up the engine quickly. Do not use
the engine's full performance until it has
reached operating temperature.
Only shift the automatic transmission to
the desired drive position when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. You could otherwise damage the
drive train.
!AMG vehicles:avoid full-load operation
and engine speeds greater than 5000rpm
when the engine is cold. This helps to
protect the engine and avoids
uncomfortable driving.
Key positions
\rTo remove the SmartKey
(shift the transmission to positionP)
Power supply for some consumers, such
as the windshield wipers
Ignition (power supply for all consumers)
and drive position
To start the engine
iThe SmartKey can be turned in the
ignition lock even if it is not the correct
SmartKey for the vehicle. The ignition is not
switched on. The engine cannot be started.
Starting the engine
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces
without sufficient ventilation.
GWARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or
parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
Driving137
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the engine compartment or in the exhaust
system.
!Do not depress the accelerator pedal
when starting the engine.
iDuring a cold start, the engine runs at
higherspeeds to enable the catalytic
converter to reach its operating
temperature. The sound of the engine may
change during this time.
Automatic transmission
XShift the transmission to positionP.
Transmission position displayPis shown in
the multifunction display.
iWhen the transmission is in positionN,
you can also start the engine with the brake
pedal depressed.
Starting procedure
XTurn the SmartKey to position3in the
ignition lock (Ypage 137)and release it as
soonas the engine is running.
Pulling away
Automatic transmission
iIt is only possible to shift the transmission
from positionPto the desired position if
you depress the brake pedal.Only then can
the parking lock be deactivated.Ifyou do
not depress the brake pedal, the DIRECT
SELECT lever can still be moved but the
parking lock remains engaged.
iIf the transmission oil temperature is
below4‡(20†), you can only shift from
positionPwhen the engine is running.
XDepress the brake pedal and keep it
depressed.
XShiftthe transmission to positionDorR.
XRelease the brake pedal.
XCarefully depress the accelerator pedal.
The electric parking brake (Ypage 154) is
automatically released.
The red indicator lamp in the
instrumentcluster goes out.
iThe vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors fromthe inside at
any time.
You can also deactivate the automatic
locking feature (Ypage 208).
iUpshifts take place at higher engine
speeds after a cold start. This helps the
catalytic converter to reach its operating
temperature more quickly.
Hill startassist
Hill start assist helps you when pulling away
forwards or in reverse on an uphill gradient.
It holds the vehicle for a short time after you
have removed your foot from the brake pedal.
This gives you enough time to move your foot
from the brake pedal to the accelerator pedal
and to depress it before the vehicle begins to
roll.
GWARNING
After a short time, hill start assist will no
longer brake your vehicle and it could roll
away. There is a risk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist.
XRemove your foot from the brake pedal.
The vehicle is then held for about a second.
XPull away.
Hill start assist is not active if:
Ryou are pulling away on a level road or on
a downhill gradient.
Rthe transmission is in positionN.
138Driving
Driving and parking

Rthe electric parking brake is applied.
RESP®is malfunctioning.
Furtherinformation on holding the vehicle
stationary on uphill gradients (Ypage 145).
ECO start/stopfunction
Introduction
The ECO start/stop function switches the
engine off automatically if the vehicle is
stopped undercertain conditions.
The engine starts automatically when the
driver wants to pull away again. The ECO
start/stop function thereby helps you to
reduce the fuel consumption and emissions
of your vehicle.
Important safety notes
GWARNING
If the engine is switchedoff automatically and
you exit the vehicle, the engine is restarted
automatically.The vehicle may begin moving.
There is a risk of accident and injury.
If you wish to exit the vehicle, always turn off
the ignition and secure the vehicle against
rolling away.
General notes
ECO start/stop display
If the\rsymbol is shown in green in the
multifunction display, the ECO start/stop
function switches the engine off
automatically if the vehicle stops moving.
The stop/start function is automatically
activated each time you start the engine with
the SmartKey.
If the ECO start/stop function has been
manually deactivated (Ypage 140) or a
malfunction has caused the system to be
deactivated, the\rsymbol is not
displayed.
AMG vehicles:the ECO start/stop function
is only available in drive programC.
Automatic engine switch-off
General notes
The ECO start/stop function is operational
and the\rsymbol is displayed in green in
the multifunction display, if:
Rthe indicator lamp in the ECO button is lit
green.
Rthe outside temperature is within the range
that is suitable for the system.
Rthe engine is at normal operating
temperature.
Rthe set temperature for the vehicle interior
has been reached.
Rthe battery is sufficiently charged.
Rthe system detects that the windshield is
not fogged up when the air-conditioning
system is switched on.
Rthe hood is closed.
Rthe driver's door is closed and the driver's
seat belt is fastened.
If not all conditions for automatic engine
switch-off are fulfilled, the\rsymbol is
shown in yellow.
iAll of the vehicle's systems remain active
when the engine has been stopped
automatically.
iThe engine can be switched off
automatically a maximum of four times
(first stop and three subsequent stops) in
succession. The\rsymbol is shown in
yellow in the multifunction display after the
engine has been started automatically for
the fourth time. When the\rsymbol is
shown in green in the multifunction display,
Driving139
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Problems with the engine
ProblemPossible causes/consequences and
Solutions
The engine does not
start.
The HOLD function or DISTRONIC PLUS is activated.
XDeactivate the HOLD function (Ypage 172) or DISTRONIC
PLUS (Ypage 164).
XTry to start the engine again.
The engine does not
start. The starter motor
can be heard.
RThere is a malfunction in the engine electronics.
RThere is a malfunction in the fuel supply.
XTurn the SmartKey back to position0in the ignition lock before
attempting to start the engine again.
XTry to start the engine again (Ypage 137). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.
The engine does not
start. You cannot hear
the starter motor.
The on-board voltage is too low because the battery is too weak
or discharged.
XJump-start the vehicle (Ypage 303).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.
The starter motor was exposed to a thermal load that was too high.
XAllow the starter motor to cool down for approximately two
minutes.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
Driving141
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Z

Shifting to neutral N
XWhen the vehicle is stationary, depress the
brake pedal.
XPush the DIRECT SELECT lever up or down
to the first point of resistance.
If the engine has been switched off, the
automatic transmission automatically shifts
toN.
Remaining in neutral N
If the automatic transmission is to remain in
neutralN, e.g. for washing the vehicle in car
washes with a towing device, please observe
the following instructions:
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.
RMake sure that the ignition is switched on.
RWhen the vehicle is stationary, depress the
brake pedal and keep it depressed.
RShift to neutralN.
RRelease the brake pedal.
RIf the electric parking brake is engaged,
release it.
RSwitch off the ignition and leave the
SmartKey in the ignition lock.
Engaging drive position D
XWhen the vehicle is stationary, depress the
brake pedal.
XPush the DIRECT SELECT lever down past
the first point of resistance.
Selector lever
Selector lever in AMG vehicles with P button
Park position with parking lock
Reverse gear
Neutral
Drive
Transmission position and drive
program display
Example
Transmission position display
Drive program display
The current transmission position and drive
program appear in the multifunction display.
144Automatic transmission
Driving and parking

Problems with the transmission
ProblemPossible causes/consequences and
Solutions
The transmission has
problems shifting gear.
The transmission is losing oil.
XHave the transmission checked at a qualified specialist
workshop immediately.
The acceleration ability
is deteriorating.
The transmission no
longer shifts into all of
the gears.
Reverse gear can no
longer be engaged.
The transmission is in emergency mode.
XStop the vehicle.
XShift the transmission to positionP.
XSwitch off the engine.
XWait at least 10 seconds before restarting the engine.
XShift the transmission to positionD.
XHave the transmission checked at a qualified specialist
workshop immediately.
Refueling
Important safety notes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and
explosion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before
refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
RIf fuel is swallowed, seek medical
assistance without delay.Donot induce
vomiting.
RImmediately change out of clothing which
has come into contact with fuel.
GWARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the
ignition if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the
wrong fuel could result in damage to the
fuel system and the engine. Notify a
qualified specialist workshop and have the
fuel tank and fuel lines drained completely.
Refueling151
Driving and parking
Z

!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

Problems with fuel and the fuel tank
ProblemPossible causes/consequences and
Solutions
Fuel is leaking from the
vehicle.
The fuel line or the fuel tank is faulty.
GWARNING
Risk of explosion or fire.
XTurn the SmartKey to position0in the ignition lock immediately
and remove it (Ypage 137).
XDo not restart the engine under any circumstances.
XConsult a qualified specialist workshop.
The fuel filler flap
cannot be opened.
The fuel filler flap is not unlocked.
or
The SmartKey battery is discharged.
XUnlock the vehicle (Ypage 72).
or
XUnlock the vehicle using the mechanical key (Ypage 73).
The fuel filler flap is unlocked, but the opening mechanism is
jammed.
XConsult a qualified specialist workshop.
Parking
Important safety notes
GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable
materials come into contact with parts of the
vehicle which are hot. Take particular care not
to park on dry grassland or harvested grain
fields.
GWARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking positionP.
Rstart the engine.
In addition, they may operate vehicle
equipment and become trapped. 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 unsupervised in the vehicle.
!Always secure the vehicle correctly
against rolling away.Otherwise, the vehicle
or its drivetraincould be damaged.
Parking153
Driving and parking
Z

To ensure that the vehicle is secured against
rolling away unintentionally:
Rthe electric parking brake must be applied.
Rthe transmission must be in positionPand
the transmission position display must
showP.
Rthe SmartKey must be removed from the
ignition lock.
Ron uphill or downhill gradients, the front
wheels must be turned towards the curb.
Switching off the engine
Important safety notes
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.
Vehicles with automatic transmission
All vehicles (except AMG vehicles)
XApply the electric parking brake.
XShift the transmission to positionP.
Selector lever in AMG vehicles
AMG vehicles:
XApply the electric parking brake.
XPressPbutton.
XTurn the SmartKey to position0in the
ignition lock and remove it.
The immobilizer is activated.
iIf you switch the engine off with the
transmission in positionRorD, the
automatic transmission shifts toN
automatically.
If you then open one of the front doors or
remove the SmartKey from the ignition, the
automatic transmission shifts toP.
If you shift the automatic transmission to
Nbefore switching off the engine, the
automatic transmission remains inNeven
if a door is opened.
iThe automatic transmission shifts toP
automatically if you:
Rswitch off the engine using the SmartKey
and remove the SmartKey from the
ignition lock or
Rswitch off the engine using the SmartKey
and open a front door.
If you attempt to turn off the engine when the
selector lever is not in positionP:
Ra message appears in the multifunction
display
Ra warning signal sounds
Electric parking brake
General notes
GWARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking positionP.
Rstart the engine.
154Parking
Driving and parking