engine MERCEDES-BENZ CLA 2018 Owner's Manual

SmartKey
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position PR
Start the engine.
There is ar isk 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.
G WARNING
If you attach heavy or large object stot he
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a
risk of an accident.
Do not attach any heavy or large object stot he
SmartKey. Remove any bulky key rings before
insertin gt he SmartKey into the ignition lock.
! Keep the SmartKey away from stron gm ag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey: R
with electronic devices, e.g. am obile phone
or another SmartKey. R
with metallic objects, e.g. coins or metal foil. R
inside metallic objects, e.g. am etal case
Vehicles with KEYLESS-GO star tf unction: do
not keep the SmartKey in the trunk .O therwise, the SmartKey may not be detected, e.g. when
startin gt he engine using the Start/Stop button.
SmartKey functions
C
7 To lock the vehicleD
T To open the trunk lid

Problem
Possible causes/consequences and P Solutions
KEYLESS-GO is malfunctioning. X
Lock/unlock the vehicle using the remote control function of the
SmartKey. X
Have the vehicle and SmartKey checked at aq ualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function: X
Unlock ( Y
page 77) or lock ( Y
page 77) the vehicle using the
mechanical key. X
Have the vehicle and SmartKey checked at aq ualified specialist
workshop.
The engine cannot be
started using the Smart-
Key. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work: X
Check the starter battery and charge it if necessary ( Y
page 278).
or X
Jump-start the vehicle ( Y
page 278).
or X
Consult aq ualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle. The vehicle is locked. X
Unlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 73) and replace it if necessary
( Y
page 73).
If this does not work: X
Start your vehicle with the SmartKey in the ignition lock.
There is interference from ap owerful source of radio waves.X
Start your vehicle with the SmartKey in the ignition lock.
You have lost aS mart-
Key. X
Have the SmartKey deactivated at aq ualified specialist workshop.X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well. SmartKey 75
Opening and closing Z

X
Press the lockin gb utton on the driver’s door
( Y
page 76).X
Check whether the lockin gk nobs on the
front-passenger door and the rear doors are
still visible. Press down the lockin gk nobs by
hand, if necessary. X
Close the driver's door. X
Take the mechanical key out of the SmartKey
( Y
page 72).X
Insert the mechanical key into the lock of the
driver's door as far as it will go.
X
Turn the mechanical key clockwise as far as it
will go to position G .X
Turn the mechanical key back and remove it. X
Make sure that the doors and the trunk lid are
locked. X
Insert mechanical key into the SmartKey
( Y
page 72).
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-theft
alarm system is not armed.
Trunk
Important safety notes
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion .T here is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open. G WARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is ar isk of injury, particu-
larly in the event of sudden braking or as ud-
den change in direction.
Always store object ssot hat they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
! The trunk lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearance above the trunk lid.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
( Y
page 320).
You should preferably place luggage or loads in
the trunk .O bserve the loading guidelines
( Y
page 237).
Do not leave the SmartKey in the trunk .Y ou
could otherwise lock yourself out.
The trunk lid can be: R
opened and closed manually from outside R
opened automatically from outside R
opened automatically from inside R
released with the emergenc yr elease from the
inside
Opening/closing from outside
Opening
X
Press the 6 button on the SmartKey. X
Pull handle C . X
Raise the trunk lid.78
Trunk
Opening and closing

Closing X
Pull down th et ru nk lid usin gh andle C .X
Let th et ru nk lid dro pi nt ot he lock.X
If necessary, loc kt he vehicle wit ht he 7
butto nont he SmartKey or wit hK EY LESS-GO.
Opening automatically from outside
Important safety notes
G WARNING
Combustion engines emit poisonous exhaust
gases suc hasc arbon monoxide. Exhaust
gases can ente rt he vehicle interio rift he
trunk lid is open when th ee ng in eisr unning,
especiall yift he vehicle is in motion .T her eisa
ris kofp oisoning.
Always switch off th ee ng in eb efore opening
th et ru nk lid. Never driv ew it ht he trunk lid
open.
! The trunk lid swings upward sw hen opened.
Therefore, mak es ure that there is sufficient
clearance abov et he trunk lid.
i The opening dimension soft he trunk lid can
be foun du nde r" Vehicle data" ( Y
page 320).
Opening automatically
You can open th et ru nk lid automaticall yu sing
th eS ma rtKey or th eh andle in th et ru nk lid.X
Press and hold the T butto nont he Smart-
Key until th et ru nk lid opens.
or X
If th et ru nk lid is unlocked, pull th et ru nk lid
handle and let it go again immediately. HANDS-FREE ACCESS
Important safety notes
G WARNING
The vehicle's exhaust system may be ver yh ot.
You coul db urn yourself by touching the
exhaust system if you use HANDS-FREE
ACCESS .T her eisar is kofi njury. Always
ensure that you only mak et he kickin gm ove-
men tw ithin th ed etection range of sensors.
! If th eS ma rtKey is within th er ear detection
range of KEYLESS-GO ,t he followin gs itua-
tions ,f or example ,c oul dl ead to th eu ninten-
tional opening of th et ru nk:R
usin gac ar wash R
usin gap ower washer
Mak es ure that th eS ma rtKey is at least 10 ft
(3 m) away from th ev ehicle.
i You can also deactivate KEYLESS-GO .F ur-
ther informatio nond eactivatin ga nd activat-
ing KEYLESS-GO ( Y
page 71).
General notes Wit hK EY LESS-GO and HANDS-FRE EA CCESS,
you can open th et ru nk lid without usin gy our
hands. This is useful if you have your hands full.
To do this, mak eak ickin gm ovement unde rt he
bumpe rw it hy our foot.
Observ et he followin gp oints:R
Carr yy our KEYLESS-GO ke ya bout your per-
son .T he KEYLESS-GO ke ym ust be in th er ear
detection range of th ev ehicle.R
When making th ek ickin gm ovement ,m ake
sure that you are standing firmly on the
ground and that there is sufficient clearance
to th er ear of th ev ehicle .Y ou coul do th erwise
lose your balance, for example on ice. Trunk 79
Opening and closing Z

R
Alway se nsure tha ty ou onl ym ak et he kicking
movement withi nt he detection range of sen-
sors C .R
Stand at leas t12in( 30 cm )a wa yf rom the
rea ra re aw hile doing so.R
Do not come into contact with the bumper
whil em ak ing the kicking movement. Other-
wise, the sensors ma yn ot functio nc orrectly.R
HANDS-FREE ACCESS does not functio nd ur -
ing engine start. R
Dirt caused by roa ds al ta round sensors C
ma yr estrict functionality.
Using the HANDS-FREE ACCESS with ap ros-
theti cl eg ma yr estrict functionality.R
If aK EYLESS-GO key is withi nt he rea rd et ec-
tio nr an ge of KEYLESS-GO ,H ANDS-FREE
ACCESS could be triggered .T he trun kl id
could thu sbeo pe ne du nintentionally, for
example, when you: -
set something down or lift something up
behind the vehicle. -
polish the rea roft he vehicle.
Do not carry the KEYLESS-GO key abou ty ou r
perso nint hes es it uations or in situations sim-
ilar to these. Thi sw il lp revent the uninten-
tional opening of the trun kl id . Operation X
To open: kick into sensor detection range C
belo wt he bumpe rw it hy ou rf oot.X
If the trunk li dd oe sn ot ope na fte rs ever al
attempts: wait at leas tt en second st hen
move your le gu nder the bumpe ro nce again.
If yo uh ol dy ou rf oo tu nder the bumpe rf or too
long, the trun kl id does not open. Repeat the leg
movement more quickl yift hi so ccurs.
Opening automaticall yf rom inside
Important safety notes
G WARNING
Combustion engine se mi tp oiso nou se xhaust
gases such as carbo nm onoxide. Exhaust
gases can ente rt he vehicl ei nterio rift he
trun kl id is open when the engine is running,
especially if the vehicl eisinm otion. There is a
ris kofp oiso ning.
Alway ss wi tch off the engine before opening
the trun kl id .N ever drive with the trun kl id
open.
! The trun kl id swing su pwar ds when opened.
Therefore ,m ak es ur et ha tt her eiss uf ficient
clearance above the trun kl id .
The opening dimensions of the trun kl id can be
found under "Vehicle data" ( Y
page 320).
Opening
Yo uc an open the trun kl id from the driver's seat
when the vehicl eiss tationar ya nd unlocked.80
Trunk
Opening and closing

motion. This could cause you to lose control of
the vehicle. There is ar isk of an accident.
Always make sure that the driver' ss eat is
engage db efore starting the vehicle.
G WARNING
You could lose control of you rv ehicl eify ou do
the following while driving: R
adjust the driver' ss eat, head restraint,
steering whee lorm irrorsR
fasten the seat belt
There is ar isk of an accident.
Adjust the driver' ss eat, head restraint, steer-
ing whee la nd mirror and fasten you rs eat belt
before starting the engine.
G WARNING
If you adjust the seat height carelessly ,y ou or
other vehicl eo ccupants could be trappe da nd
thereby injured. Children in particular could
accidentally press the electrica ls eat adjust-
ment buttons and become trapped. There is a
risk of injury.
Whil em oving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustment sys-
tem.
! To avoi dd amage to the seats and the seat
heating, observe the following information: R
keep liquid sf rom spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible. R
if the seat covers are damp or wet, do not
switch on the seat heating. The seat heat-
ing should als on ot be used to dry the seats.R
clean the seat covers as recommended;
see the "Interior care" section. R
do not transport heavy loads on the seats.
Do not place sharp objects on the seat
cushions, e.g. knives, nail sort ools. The
seats should only be occupied by passen-
gers, if possible. R
when the seat heating is in operation, do
not cover the seats with insulating materi-
als ,e .g. blankets, coats, bags ,s eat covers,
child seats or booster seats. ! Make sure that there are no objects in the
footwel lu nder or behind the seats when mov-
ing the seats back. There is ar isk that the
seats and/or the objects could be damaged.
i Further related subjects: R
cargo compartment enlargement (folding
down the rear seats) ( Y
page 240)
Adjusting the seats manually
Vehicles without the seating comfort
package
Seat fore-and-aft adjustment: X
Lift handle C and slid et he seat forwards or
backwards. X
Release lever C again.
Make sure that you hear the seat engage in
position.
Backrest angle: X
Relieve the pressure on the backrest. X
Turn handwheel

Problems with the seat heating Problem
Possible causes/consequences and P Solutions
The seat heating has
switched off prematurely
or cannot be switched
on. The on-board voltage is too low because too many electrical consum-
ers are switched on. X
Switch 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 heating will switch
back on automatically.
Steering wheel
Important safety notes
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steering wheel or mirrors R
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, head restraint ,s teer-
ing wheel and mirror and fasten your seat belt
before startin gt he engine.
G WARNING
Children could injure themselves if they
adjust the steering wheel. There is ar isk 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
G WARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is ar isk of an
accident.
Before startin go ff, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion. C
Release lever D
Adjust st he steering wheel height

Mirrors
Rear-view mirror X
Anti-glare mode: flick anti-glare lever C for-
wards or back.
Exterior mirrors
Adjusting the exterior mirrors
G WARNING
You coul dl ose control of you rv ehicl eify ou do
the following while driving: R
adjust the driver's seat, hea dr estraint,
steering whee lorm irrorsR
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, hea dr estraint, steer-
ing whee la nd mirror and fasten you rs eat belt
before starting the engine.
G WARNING
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 coul dm isjudge the dis-
tance from road users traveling behind, e.g.
when changing lane .T here is ar isk of an acci-
dent.
For this reason, alway sm ake sure of the
actua ld istance from the road users traveling
behind by glancing over you rs houlder. X
Turn the SmartKey to position G or H in the
ignitio nl ock ( Y
pag e1 22).X
Exterior mirror on the front-passenger side:
press button D .
Exterior mirror on the driver's side :p ress but-
ton C .
The indicator lamp in the corresponding but-
ton lights up in red.
The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button

take precedence ove rt he daytime running
lamps.
US Ao nly:
The daytime running lamps improve the visibility
of your vehicl ed ur in gt he day. To do this, the
daytime running lamps functio nm us tb e
switched on using the on-board computer
( Y
page 187).
If the engine is running and yo ut ur nt he light
switch to the ` or X position, the manual
setting st ake precedence ove rt he daytime run-
ning lamps.
Low-beam headlamps Even if the light senso rd oe sn ot detect tha titi s
dark, the parking lamps and low-bea mh ead-
lamps switch on when the ignition is switched on
and the light switch is se ttot he X position.
Thi sisa particularly usefu lf un ctio nint he event
of rain and fog. X
To switc ho nt he low-beam headlamps:
tur nt he SmartKe ytop osit ion H in the igni-
tio nl oc kors tart the engine.X
Turn the light switch to X .
The green X indicator lamp in the instru-
ment cluste rl ig hts up.
Rea rf og lampThe rea rf og lamp improves visibility of your
vehicl ef or the traffi cb ehin dint he event of thick
fog .P leas et ake note of the country-specific
regulations for the us eofr ea rf og lamps.X
To switc ho nt he rear fo gl amp: tur nt he
SmartKe yint he ignition lock to position H or
s tart
the engine.X
Turn the light switch to X or X .X
Press the ^ button.
The yellow ^ indicator lamp in the instru-
ment cluste rl ig hts up.X
To switc ho ff the rear fo gl amp: press the
^ button.
The yellow ^ indicator lamp in the instru-
ment cluste rg oe so ut .
i When the rea rf og lamp is switched on, the
cente rb rake lamp in the tai ll am ps wi tches off
du etoal egal requirement.
Parkin gl amps
! If the battery charge is ver yl ow ,t he parking
lamps or standing lamps ar ea ut omatically
switched off to enabl et he next engine start.
Alway sp ar ky ou rv ehicl es af el ya nd in aw el ll it area ,ina ccordance with the relevant legal
stipulations. Avoi du si ng the ` parking
lamps ove rap er io dofs ev eral hours. If pos-
sible, switch on the right-hand d or left-
hand c standing lamps. X
To switc ho n: tur nt he light switch to ` .
Th eg reen ` indicator lamp in the instru-
ment cluste rl ig hts up.
Standin gl ampsSwitching on the standing lamps ensures the
corresponding side of the vehicl eisi llumin ated.X
To switc ho nt he standin gl amps: the
SmartKe yisn ot in the ignition lock or it is in
position Z in the ignition lock. X
Turn the light switch to c (left-hand side of
the vehi cle) or d (
right-hand side of the
vehicle).
Combination switch
X
To indicate briefly: press the combination
switch briefl ytot he pressure point in the
directio nofa rr ow D or

Replacing the wiper blades
Important safety notes
G WARNING
If the windshield wiper sb egin to move while
yo ua re changing the wiper blades, yo uc ould
be trapped by the wiper arm .T here is ar is ko f
injury.
Alway ss witch off the windshield wiper sa nd
ignition before changing the wiper blades.
! To avoid damaging the wiper blades, make
sure that yo ut ouch only the wiper arm of the
wiper.
! Neve ro pe nt he hoo difaw in dshield wiper
arm ha sb ee nf olded away from the wind-
shield.
Neve rf ol daw in dshield wiper arm withou ta
wiper blad eb ac ko nto the windshield.
Hol dt he windshield wiper arm firmly when
yo uc hange the wiper blade. If yo ur elease the
windshield wiper arm withou taw ip er blade
and it falls onto the windshield ,t he windshield
may be damaged by the force of the impact.
Mercedes-Benz recommend st hat yo uh av e
the wiper blades changed at aq uali fied spe-
cialist workshop.
Changin gt he windshield wiper blades
Removin gt he wiper bladesX
Vehicles without KEYLESS-GO or KEY-
LESS-G Os tart function: remove the Smart-
Key from the ignition lock. X
Vehicles with KEYLESS-GO or KEYLESS-
GO start function: switch off the engine.X
Fol dt he wiper arm away from the windshield. X
Hol dontot he wiper arm with one hand. With
the othe rh an d, turn wiper blad eind ir ection
of arrow C away from the wiper arm as far as
it will go. X
Slide catch D in the direction of arrow