2018 MERCEDES-BENZ CLA engine

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

Overview of climat ec ontrol systems
General notes Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To preven tt he windows from fogging up:R
switch off climate control only briefly R
switch on air-recirculation mode only briefly R
switch on the cooling with air dehumidifica-
tion function R
switch on the defrost windshield function
briefly, if required
The air-conditionin gs ystem or dual-zon ea uto-
matic climate control regulates the temperature
and the humidity of the vehicle interior and fil-
ters undesirable substances from the air.
The air-conditionin gs ystem or dual-zon ea uto-
matic climate control can only be operated
when the engin eisr unning. Optimum operation
is only achieved with the side windows and pan-
orama roof with power tilt/sliding panel closed.
If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated ( Y
page 83).
The residual heat function can only be activated
or deactivated with the ignition switched off
( Y
page 119). Always keep the ventilation flaps behind the
side trim panel in the cargo compartment clear
( Y
page 106). Otherwise the vehicle will not be
ventilated correctly.
i Ventilate the vehicle for ab rief period during
warm weather, e.g. using the convenience
opening feature ( Y
page 83). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly.
i The integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. Ac logged filter reduces the
amount of air supplied to the vehicle interior.
For this reason, you should alway so bserve
the interval for replacing the filter, which is
specified in the Maintenance Booklet. As it
depends on environmental conditions ,e .g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance Book-
let.
i It is possible that under certain circumstan-
ces the residual heat function may be activa-
ted automatically an hour after the SmartKey
has been removed in order to dry the auto-
mat ic climate control. The vehicle is then ven-
tilated for 30 minutes.110
Overview of climat ec ontrol systems
Climat ec ontrol

Note sonb reaking-in an ew vehicle
Important safety notes Th es en so rs ys te mofs om ed riving and driving
safety systems adjusts automaticall yw hile a
certai nd is tance is being driven after the vehicle
ha sb ee nd elivere dora ft er repairs. Full system
effectiveness is not reache du nti lt he end of this
teach-i np rocedure.
New and replaced brake pads and discs only
reach their optimum braking effect after several
hundred kilometers of driving. Compensate for
thi sb ya pplyin gg reate rf orce to the brake pedal.
The first 1000 miles (150 0k m)Th em or ey ou look after the engine when it is
new ,t he mor es at isfied yo uw il lbew it hi ts per-
formance in the future. R
Yo us houl dt herefore drive at varying vehicle
and engine speeds for the first 1000 miles
(1500 km). R
Avoi dh eavy loads, e.g .d riving at full throttle,
during thi sp eriod.R
Chang eg ea ring oo dt ime, befor et he tach-
ometer needl ei s