engine MERCEDES-BENZ CLS 2014 Service Manual

properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information,see the
"Children in the vehicle" section.
Achild's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
!To avoid damage to the seats and the seat
heating, observe the following information:
Rkeep liquids from spilling on the seats. If
liquidisspilled on the seats, dry them as
soon as possible.
Rif the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not be used to dry
the seats.
Rclean the seat covers as recommended;
see "Interior care".
Rdo not transport heavy loads on the
seats. Do not place sharp objectsonthe
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible.
Rwhen the seat heating is in operation, do
not cover the seats with insulating
materials, e.g. blankets, coats, bags,
seat covers, child seats or booster seats.
!Make sure that there are no objectsinthe
footwell or behind the seats when resetting
the seats. There isarisk that the seats
and/or the objectscould be damaged.
iThe head restraintsinthe front seats are
installed with the NECK-PRO system
(Ypage 53). For this reason, it is not
possible to remove the head restraints
from the front seats.
For more information,contactaqualified
specialist workshop.
iFurther related subjects:
Adjusting the seats
Head restraint height
Seat cushion angle
$Seat height
!Seat fore-and-aft adjustment
Backrest angle
iIf PRE-SAFE®is triggered, the front-
passenger seat will be moved toabetter
position if it was previously in an
unfavorable position.
iYou can store the seat settings using the
memory function (Ypage 112).
iVehicles with the through-loading
feature: if you fold downarear seat
backrest, the respective front seat is
moved forwards slightly in order to avoid
contact.
Adjusting the head restraints
Important safety notes
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
Rfasten the seat belt
There isarisk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before startingthe engine.
100Seats
Seats, steering whee la nd mirrors

Problems with the seat ventilation
ProblemPossible causes/consequences andSolutions
The seat ventilation has
switched off
prematurely or cannot
be switched on.
The on-board voltage is too low because too many electrical
consumers are switched on.
XSwitch off electrical consumers that you do not need, such as
the rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat ventilation will
switch back on automatically.
Steering wheel
Important safety notes
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
Rfasten the seat belt
There isarisk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before startingthe engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There isarisk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
Adjusting the steering wheel
electrically
To adjust the steering wheel height
To adjust the steering wheel position
(fore-and-aft adjustment)
iFurther related subjects:
REASY-ENTRY/EXIT feature
(Ypage 108)
RStoring settings (Ypage 112)
106Steering wheel
Seats, steering whee la nd mirrors

Position of the steering wheel for
driving
The steering wheel is moved to the last
selected position when:
Rthe driver's door is closed
Rwith KEYLESS-GO:you press the Start/
Stop button once on vehicles with
KEYLESS-GO
or
Rwith the SmartKey:you insert the
SmartKey into the ignition lock.
When you close the driver's door with the
ignition switched on, the steering wheel is
also automatically moved to the previously
set position.
The last position of the steering wheel is
stored when you switch off the ignition or
when you store the settingwith the memory
function (Ypage 112).
Crash-responsive EASY-EXIT feature
If the crash-responsiveEASY-EXITfeature is
triggeredinanaccident,the steeringcolumn
will moveupwards when the driver's door is
opened. This occurs irrespective of the
position of the SmartKey in the ignition lock.
This makes it easier to exit the vehicle and
rescue the occupants.
The crash-responsiveEASY-EXITfeature is
only operational if the EASY-EXIT/ENTRY
feature is activated in the on-board computer.
(Ypage 233)
Mirrors
Exterior mirrors
Adjusting theexterior mirrors
GWARNING
You could lose control of your vehicle if you
do the followingwhile driving:
Radjust the driver's seat,head restraint,
steeringwheel or mirrors
Rfasten the seat belt
There isarisk of an accident.
Adjust the driver's seat, head restraint,
steeringwheel and mirror and fasten your
seat belt before starting the engine.
GWARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you could misjudge the
distancefrom road users travelingbehind,
e.g. when changinglane. There isarisk of an
accident.
For this reason, alwaysmake sure of the
actual distancefrom the road users traveling
behind by glancingover your shoulder.
XTurn the SmartKey to position1or2in the
ignition (Ypage 147).
XPress buttonfor the left-hand exterior
mirror or buttonfor the right-hand
exterior mirror.
The indicator lamp in the corresponding
button lights up in red.
Mirrors109
Seats, steering wheel and mirrors
Z

The indicator lamp goes out again after
some time. You can adjust the selected
mirror using adjustmentbutton$as long
as the indicator lamp is lit.
XPress adjustmentbutton$up, down,or
to theleft or right until you have adjusted
theexteriormirror to thecorrectposition.
You should haveagood overview of traffic
conditions.
The convex exteriormirrors providealarger
field of vision.
After the engine has been started, the
exterior mirrors are automatically heatedif
the rear window defroster is switched on and
the outside temperature is low. Heating takes
amaximum of 10 minutes.
iThe exterior mirrors can also be heated
manually by switching on the rear window
defroster.
Folding theexterior mirrorsinorout
electrically
XTurn the SmartKey to position1or2in the
ignition (Ypage 147).
XBriefly press button.
Bothexterior mirrors fold in or out.
iMake sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
iIf you are drivingfaster than 30 mp/h
(47 km/h), you can no longer fold in the
exterior mirrors.
Setting theexterior mirrors
If the battery has been disconnected or
completely discharged, the exterior mirrors
must be reset.The exterior mirrors will
otherwise not fold in when you select the
"Fold in mirrors when locking" function in the
on-board computer (Ypage 233)
XTurn the SmartKey to position1in the
ignition lock (Ypage 147).
XBriefly press button.
Folding the exterior mirrors in or out
automatically
If the "Fold in mirrors when locking" function
is activated in the on-board computer
(Ypage 233):
Rthe exterior mirrors fold in automatically as
soon as you lock the vehicle from the
outside.
Rthe exterior mirrors fold out again
automatically as soon as you unlock the
vehicle and then open the driver's or front-
passenger door.
iIf the exterior mirrors have been folded in
manually,they do not fold out.
Exterior mirror pushed out of position
If an exterior mirror has been pushed out of
position, proceed as follows:
XVehicles without electrically folding
exterior mirrors:move the exterior mirror
into the correct position manually.
XVehicles with electrically folding
exterior mirrors:press and hold mirror-
folding buttonuntil you hearaclick and
then the mirrors engage in position
(Ypage 110).
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
(Ypage 109).
110Mirrors
Seats, steering whee la nd mirrors

The exterior lighting (except the parking/
standinglamps) switches off automatically if
you:
Rremove the SmartKey from the ignition lock
Ropen the driver's door with the SmartKey
in position0.
Automatic headlampmode
GWARNING
When the light switch is set to\r,the low-
beam headlamps may not be switched on
automatically if there is fog, snow or other
causes of poor visibility due to the weather
conditions such as spray. There isarisk of an
accident.
In such situations, turn the light switch to
.
The automatic headlamp feature is only an
aid. The driver is responsible for the vehicle's
lighting at all times.

Left-hand standinglamps
\nRight-hand standinglamps
Parking lamps, license plate and
instrument cluster lighting
\rAutomatic headlamp mode,
controlled by the light sensor
Low-beam/high-beam headlamps
\ris the favored light switch setting. The
light setting is automatically selected
accordingtothe brightness of the ambient
light (exception: poor visibility due to weather
conditions such as fog, snow or spray):
RSmartKey in position1in the ignition lock:
the parking lamps are switched on or off
automatically depending on the brightness
of the ambient light.
RWith the engine running: if you have
activated the daytime runninglamps
function via the on-board computer,the
daytime runninglamps or the low-beam
headlamps and parking lamps are switched
on or off automatically depending on the
brightness of the ambient light.
XTo switch on automatic headlamp
mode:turn the light switch to\r.
Only for Canada:
The daytime runninglamps improve the
visibility of your vehicle during the day. The
daytime runninglamps function is required by
law in Canada. It cannot therefore be
deactivated.
When the engine is runningand the vehicle is
stationary: if you move the selector lever from
adrive position toP,the daytime running
lamps/low-beam headlamps go out after
three minutes.
When the engine is running, the vehicle is
stationary and in high ambient light: if you
turn the light switch to,the daytime
runninglamps and parking lamps switch on.
If the engine is runningand you turn the light
switch to,the manual settings take
precedenceover the daytime runninglamps.
USA only:
The daytime runninglamps improve the
visibility of your vehicle during the day. To do
this, the daytime runninglamps function must
be switched on using the on-board computer
(Ypage 230).
If the engine is runningand you turn the light
switch toor,the manual settings
Exterior lighting117
Lights and windshield wipers
Z

take precedence overthe daytime running
lamps.
Low-beam headlamps
GWARNING
When the lightswitchisset to\r,thelow-
beam headlampsmay not be switchedon
automatically if there is fog, snow or other
causes of poor visibility due to theweather
conditions such as spray. Thereisarisk of an
accident.
In such situations, turnthe light switch to
.

Left-hand standing lamps
\nRight-hand standing lamps
Parking lamps, license plate and
instrumentcluster lighting
\rAutomatic headlamp mode,
controlled by the light sensor
Low-beam/high-beam headlamps
Even if the light sensor does not detect that
it is dark,the parking lamps and low-beam
headlamps switchonwhen the ignition is
switched on and the light switchisset to the
position. This isaparticularly useful
function in the eventofrain and fog.
XTo switch on thelow-beam headlamps:
turnthe SmartKey in the ignition lock to
position2or start the engine.
XTurn the light switchto.
The greenindicator lamp in the
instrumentcluster lightsup.
Parking lamps
!If the battery has been excessively
discharged, the parking lamps or standing
lamps are automatically switched off to
enable the nextengine start. Alwayspark
your vehiclesafelyand sufficiently lit
according to legalstandards.Avoid the
continuoususe of theparking lamps
for severalhours.Ifpossible, switch on the
\nright or theleft standinglamp.

Left-hand standinglamps
\nRight-hand standinglamps
Parking lamps, license plate and
instrument cluster lighting
\rAutomatic headlamp mode,
controlled by the light sensor
Low-beam/high-beam headlamps
XTo switch on:turn the light switch to
.
The greenindicator lamp in the
instrument cluster lights up.
118Exterior lighting
Lights and windshiel dw ipers

Standing lamps

Left-hand standing lamps
\nRight-hand standing lamps
Parking lamps, license plate and
instrumentcluster lighting
\rAutomatic headlamp mode,
controlled by the light sensor
Low-beam/high-beam headlamps
Switchingonthe standinglamps ensuresthe
corresponding side of thevehicle is
illuminated.
XTo switch on thestanding lamps:the
SmartKey is notintheignition lockoritis
in position0.
XTurn thelight switch to(left-handside
of thevehicle)or\n(right-hand side of
thevehicle).
Combination switch
Turn signal
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo indicatebriefly:pressthecombination
switch briefly to thepressure pointinthe
direction of arrowor!.
The corresponding turn signal flashes three
times.
XTo indicate:press the combination switch
beyond the pressure point in the direction
of arrowor!.
High-beam headlamps
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo switch on the high-beam headlamps:
turn the SmartKey in the ignition lock to
position2or start the engine.
XTurn the light switch toor\r.
XPress the combination switch beyond the
pressure point in the direction of
arrow.
In the\rposition, the high-beam
headlamps are only switched on when it is
dark and the engine is running.
Exterior lighting119
Lights and windshield wipers
Z

The blueindicator lamp in the
instrument cluster lights up when the high-
beam headlamps are switched on.
XTo switch off the high-beam
headlamps:move the combination switch
back to its normal position.
The blueindicator lamp in the
instrument cluster goes out.
iVehicles with Adaptive Highbeam Assist:
when Adaptive Highbeam Assist is active,
it controls activation of the high-beam
headlamps (Ypage 121).
High-beam flasher
High-beam headlamps
Turn signal, right
$High-beam flasher
!Turn signal, left
XTo switch on:turn the SmartKey in the
ignition lock to position1or2,orstart the
engine.
XPull the combination switch in the direction
of arrow$.
Hazard warning lamps
XTo switch on the hazard warning lamps:
press button.
All turn signals flash. If you now switch on
aturn signal using the combination switch,
only the turn signal lamp on the
corresponding side of the vehicle will flash.
XTo switch off the hazard warning
lamps:press button.
The hazard warning lamps automatically
switch on if:
Ran air bag is deployed
Rthe vehicle decelerates rapidly from a
speed of more than 45 mph (70 km/h) and
comes toastandstill
The hazard warning lamps switch off
automatically if the vehicle reachesaspeed
of over6mph (10 km/h) again afterafull
brake application.
iThe hazard warning lamps still operate if
the ignition is switched off.
Headlampcleaning system
The headlamps are cleaned automatically if
the "Wipe with washer fluid" function is
operated five times (Ypage 125)while the
lightsare on and the engineisrunning. When
you switchoff the ignition, the automatic
headlamp cleaning systemisreset and
counting is resumed from 0.
120Exterior lighting
Lights and windshield wipers

Problems with the windshield wipers
ProblemPossible causes/consequences andSolutions
The windshield wipers
are jammed.
Leaves or snow, for example, may be obstructing the windshield
wiper movement.The wiper motor has been deactivated.
XFor safety reasons, you should remove the SmartKey from the
ignition lock.
or
XSwitch off the engine using the Start/Stop button and open the
driver's door.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.
The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked ataqualified specialist
workshop.
128Windshield wipers
Lights and windshield wipers

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 notethat your vehicle may
not be equipped with all features
described. This also applies to safety-
related systemsand functions.
iRead the information on qualified
specialist workshops: (Ypage 26).
Overview of climatecontrol systems
Important safetynotes
Observethe settings recommendedonthe
following pages. The windows could
otherwise fog up.
To preventthe windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only
briefly
Rswitch on the cooling with air
dehumidification function
Rswitch on the defrost windshield function
briefly, if required
Climate control regulates the temperature
and the humidity in the vehicle interior and
filters undesirable substances out of the air.
Climate control can only be operated when
the engine is running. Optimum operation is
only achieved with the side windows and roof
closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Ypage 141).
iVentilate the vehicle forabrief period
during warm weather, e.g. using the
convenience opening feature (Ypage 89).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
iThe integrated filter filters out most
particles of dust and soot and completely
filters out pollen. It also reduces gaseous
pollutantsand odors.Aclogged filter
reduces the amountofair supplied to the
vehicle interior.For this reason, you should
always observe the interval for replacing
the filter, which is specified in the
Maintenance Booklet.Asitdepends on
environmental conditions, e.g. heavy air
pollution, the interval may be shorter than
stated in the Maintenance Booklet.
130Overview of climatecontrol systems
Climat ec ontrol