2018 MERCEDES-BENZ CLA light

KEYLESS- GO
Gene ra ln ot esBear in min dt ha tt he engin ec an be started by
any of th ev ehicl eo cc upant sift he re is aS ma rt -
Key in th ev ehicle.
Lockin ga nd unlockingYou can start ,l oc koru nloc kt he vehicl eu sin g
KEYLESS-GO .Todot hi s, you only need carry th e
SmartKey wit hy ou. You can combine th ef unc-
tion sofK EY LESS-GO wit ht ho se of ac onven-
tional SmartKey. Unloc kt he vehicl ebyu sin g
KEYLESS-GO ,f or instance ,a nd loc kitu sin gt he
7 butto nont he SmartKey.
The driver's door and th ed oor at whic ht he han -
dle is used ,m us tb ot hbec losed. The SmartKey
mus tbeo utside th ev ehicle. Whe nl ocking or
unlocking wit hK EY LESS-GO ,t he distanc e
between th eS ma rtKey and th ec orre sponding
door handle mus tn ot be greate rt ha nt hr ee fee t
(on em eter).
Ac heck whic hp eriodically establishes ar adi o
connection between th ev ehicl ea nd th eS ma rt -
Key determine sw hether av alid SmartKey is in
th ev ehicle. This occurs, for example: R
when starting th ee ng in eR
while drivin gR
when usin gH ANDS-F RE EA CCESSR
when th ee xternal door handles are touchedR
during convenience closin g
X
To unlock th ev ehicle: touch th ei nner sur -
fac eoft he door handle.X
To lock th ev ehicle: touch sensor surfac e C
or D . Mak es ur et ha ty ou do no tt ou ch th ei nner
surfac eoft he door handle. X
Convenienc ec losin gf eature: touch
recessed sensor surfac e D for an extended
period.
Further information on th ec onveni ence clos-
ing feature ( Y
page 83).
X
To unlock th et ru nk lid : pull trunk lid han -
dle C .
Deactivating and activating If you do no ti nten dtou se th ev ehicl ef or al on -
ger period of time, you can deactivat eK EY LESS -
GO. The SmartKey will then use ver yl ittl ep ower,
thereby conserving battery power. Fo rt he pur-
poses of activation/deactivation ,t he vehicl e
mus tn ot be nearby. X
To deactivate: press th e 7 butto nont he
SmartKey twice in rapi ds uccession .
The battery chec kl amp of th eS ma rtKey
flashes twice briefl ya nd lights up once ,t he n
KEYLESS-GO is deactivated ( Y
page 73).X
To activate: press any butto nont he Smart -
Key.
or X
Inser tt he SmartKey int ot he ignition lock.
KEYLESS-GO and all of it sa ssociated features
are available again .
KEYLESS- GO star tf un ction
Gene ra ln ot es
Bear in min dt ha tt he engin ec an be started by
any of th ev ehicl eo cc upant sift he re is aS ma rt -
Key in th ev ehicle.SmartKey 71
Opening and closing Z

SmartKey battery
Important safety notes
G WARNING
Batteries contain toxic and corrosive substan-
ces. If batteries are swallowed, it can result in
severe health problems. There is ar isk of fatal
injury.
Keep batteries out of the reach of children. If
ab attery is swallowed, seek medical attention
immediately.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm .
Mercedes-Benz recommends that you have the
battery replaced at aq ualified specialist work-
shop.
Checking the battery
X
Press the 7 or 6 button.
The battery is working properly if battery
check lamp C lights up briefly.
The battery is discharged if battery check
lamp C does not light up briefly.X
Change the battery ( Y
page 73).
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the 7 or 6 button:R
locks or R
unlocks the vehicle
i You can get ab attery at any qualified spe-
cialist workshop. Replacing the battery You require aCR2 025 3Vc ell battery.X
Take the mechanical key out of the SmartKey
( Y
page 72).
X
Press mechanical key D into the opening in
the SmartKey in the direction of the arrow
until battery tray cover C opens. When doing
so, do not hold cover C shut.X
Remove battery tray cover C .
X
Repeatedly tap the SmartKey against your
palm until battery

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

Door s
Important safet yn otes
G WARNING
If children are lef tu nsupervised in th ev ehicle,
they could: R
ope nt he doors ,t hu se nd angerin go th er
people or road users. R
get out and disrup tt ra ffic .R
operat et he vehicle' se quipment.
Additionally, children could set th ev ehicle in
motion if, fo re xa mple, they:R
release th ep arking brake .R
shiftin gt he automatic transmissio no ut of
par kp osition PR
Start th ee ng ine.
There is ar is kofana cciden ta nd injury.
Whe nl eavin gt he vehicle, always take th e
SmartKey wit hy ou and loc kt he vehicle. Never
leav ec hi ldren or animals unattended in th e
vehicle. Always keep th eS ma rtKey out of
reach of children .
You should preferably plac el uggage or load si n
th ec argo compartment. Observ et he loadin g
guidelines ( Y
page 237).
Unlockin ga nd opening doors from
th ei nside
! The sid ew indows will no to pen/close if th e
battery is discharged or if th es id ew indows
hav ei ce du p. It will then no tbep ossible to
close th ed oor. Do no ta ttemp ttof orce th e
doo rc lo sed. You could otherwise damage th e
doo rort he sid ew indow.
Whe nad oo riso pened, th es id ew indow on that
sid eo pens slightly. Whe nt he doo risc lo sed, th e
sid ew indow close sa gain . X
To unlock an do pe naf ro nt door: pull doo r
handle D .
If th ed oo risl ocked, locking knob C pop su p.
The doo risu nlocke da nd opens .X
To unlock ar ea rd oor: pull up locking
knob C .
The doo risu nlocke da nd can be opened.X
To ope nar ea rd oor: pull doo rh andle D .
You can ope nad oo rf ro mi ns id et he vehicle
eve nifith as bee nl ocked. You can only ope nt he
rea rd oors from insid et he vehicle if they are no t
secure dbyt he child-proof locks ( Y
page 60).
If th ev ehicle has previously bee nl ocke dw it h
th eS ma rtKey from th eo utside, opening ad oo r
from th ei ns id ew ill trigger th ea nti-thef ta lar m
system. Switc ho ff th ea lar m( Y
page 68).
Centrally locking an du nl ocking th e
vehicle from th ei nsideYou can centrall yl oc koru nloc kt he vehicle from
th ei ns ide. Thi sc an be useful if you wish to loc k
th ev ehicle befor ep ulling away, fo re xa mple.
X
To unlock : press butto n C .X
To lock : press butto n D .
If all th ed oors and th et ru nk lid are closed, th e
vehicle locks .76
Doors
Opening an dc losing

X
To open: pull remote operating switch C for
the trunk li du nti lt he trunk li do pe ns.
Emergenc yr eleas ef or the trunk
General notes
! The trunk li ds wi ng su pwar ds when opened.
Therefore, make sure tha tt her eiss uf ficient
clearance above the trunk lid.
The opening dimensions of the trunk li dc an be
found in the "Vehicle data" section
( Y
page 320).
If the trunk li dc an no longer be unlocked:R
using the SmartKey ,o rR
using the remote operating switch in the door
contro lp an el:
Use the emergency release on the insid eoft he
trunk lid.
Yo uc an reach the emergency release via the
trunk.
Opening X
Fol dt he rea rs ea tb ac kres tf orwards
( Y
page 240). X
Insert as ui tabl et ool D ,e .g .as crewdriver,
into opening C in the paneling.
The trunk li disr eleased. X
Ope nt he trunk lid.
Emergenc yr eleas eb uttonYo uc an open the trunk li df rom insid et he vehi-
cle with the emergency release button.
X
Press emergency release button C briefly.
The trunk li du nlocks and opens.
The trunk li dc an be unlocke da nd opene dw it h
the trunk li de mergency release when the vehi-
cle is stationary or whil ed riving.
The trunk li de mergency release does not open
the trunk li dift he battery is disconnected or
discharged.
Trunk li de mergency release light: R
Emergency release button C flashe sf or
30 minutes afte rt he trunk li diso pe ned.R
Emergency release button C flashe sf or
60 minutes afte rt he trunk li disc losed.
Side windows
Important safety notes
G WARNING
While opening the side windows ,b od yp ar ts
could become trappe db et ween the side win-
do wa nd the door frame as the side window
moves. There is ar is kofi njury.
Make sure tha tn obod yt ouche st he side win-
do wd ur ing the opening procedure. If some-Side windows 81
Opening and closing Z

On vehicles with ap anorama roof with power
tilt/sliding panel: X
Press and hold the 7 button agai nu ntil the
roller sunblind of the panorama roof with
power tilt/sliding panel closes. X
To interrup tc onvenienc ec losing: release
the 7 button.
Using KEYLESS-GO The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. The gap between
the SmartKey and the corresponding door han-
dle should not be greater than 3ft(1m ).
X
Touch recessed sensor surface C on the
door handle until the side windows and the
panorama roof with power tilt/sliding panel
are fully closed.
i Make sure you only touch recessed sensor
surface C .X
Make sure that all the side windows are
closed. X
Make sure that all the side windows and the
panorama roof with power tilt/sliding panel
are closed. On vehicles with ap anorama roof with power
tilt/sliding panel: X
Touch recessed sensor surface C on the
door handle agai nu ntil the roller sunblind of
the panorama roof with power tilt/sliding
panel closes. X
To interrup tc onvenienc ec losing: release
recessed sensor surface C on the door han-
dle.
Resetting the side windows If as ide window can no longer be closed fully,
you must reset it. X
Close all the doors. X
Turn the SmartKey to position G or H in the
ignition lock ( Y
page 122). X
Pull the corresponding switch on the door
control panel until the side window is com-
pletely closed ( Y
page 82).X
Hold the switch for an additional second.
If the side window opens agai ns lightly:X
Immediately pull the corresponding switch on
the door control panel until the side window is
completely closed ( Y
page 82).X
Hold the switch for an additional second. X
If the respective side window remains closed
after the button is released ,t hen it has been
set correctly. If this is not the case, repeat the
steps above.
Problems with the side windows
G WARNING
If you close as ide window agai ni mmediately after it has been blocked or reset, the side window
closes with increased or maximum force. The reversing feature is then not active. Parts of the
body could be trapped in the closing area in the process. This poses an increased risk of injury or
even fatal injury.
Make sure that no parts of the body are in the closing area. To stop the closing process, release
the switch or push the switch agai ntor eopen the side window.84
Side windows
Opening and closing

Problem
Possible causes/consequences and P Solutions
As ide window cannot be
closed because it is
blocked by objects, e.g.
leaves in the window
guide. X
Remove the objects. X
Close the side window.
As ide window cannot be
closed and you cannot
see the cause. If as ide window is obstructed during closing and reopens again
slightly: X
Immediately after the window blocks, pull the correspondin gs witch
again until the side window has closed.
The side window is closed with increased force.
If as ide window is obstructed again during closing and reopens again
slightly: X
Immediately after the window blocks, pull the correspondin gs witch
again until the side window has closed.
The side window is closed without the automatic reversing feature.
Panoram ar oof with power tilt/sliding
panel
Important safety notes In the following section, the term "sliding sun-
roof" refers to the panorama roof with power
tilt/sliding panel.
G WARNING
While opening and closing the sliding sunroof,
body parts in close proximity could become
trapped. There is ar isk of injury.
Make sure that no body parts are in close
proximity during the opening and closing pro-
cedures.
If somebody becomes trapped: R
release the switch immediately, or R
during automatic operation, push the
switch briefly in any direction
The opening or closing procedure will be stop-
ped.
G WARNING
If children operate the sliding sunroof they
could become trapped, particularly if they are
left unsupervised. 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.
G WARNING
At high speeds the raised sliding sunroof auto-
matically lowers slightly at the rear. This could
trap you or other persons. There is ar isk of
injury. Make sure that nobody reaches into
the sweep of the sliding sunroof whilst the
vehicle is in motion.
If somebody becomes trapped, immediately
pull back the sliding sunroof switch. The slid-
ing sunroof lifts during opening.
! Only open the sliding sunroof if it is free of
snow and ice. Otherwise, malfunctions may
occur.
Do not allow anything to protrude from the
sliding sunroof. Otherwise, the seals could be
damaged.
! The weather can change abruptly. It could
start to rain or snow. Make sure that the slid-
ing sunroof is closed when you leave the vehi-
cle. The vehicle electronics can be damaged if
water enters the vehicle interior.
i Resonance noises can occur in addition to
the usual airflow noises when the sliding sun-
roof is open. They are caused by minor pres-Panoram ar oof with power tilt/sliding panel 85
Opening and closing Z

sure fluctuations in the vehicle interior.
Change the position of the sliding sunroof or
open as ide window slightly to reduce or elim-
inate these noises.
Sliding sunroof reversing feature In the following section, the term "sliding sun-
roof" refers to the panorama roof with power
tilt/sliding panel.
The sliding sunroof is equipped with an auto-
matic reversing feature. If as olid object blocks
or restrict st he sliding sunroof during the closing
process, the sliding sunroof opens agai na uto-
matically .H owever, the automatic reversing
feature is only an aid and does not relieve you of
the responsibility of paying attention when clos-
ing the sliding sunroof.
G WARNING
The reversing feature does not react: R
to soft, light and thin objects, e.g. small fin-
gers R
over the last 1/6 in (4 mm) of the closing
movement R
during resetting R
when closing the sliding sunroof agai nm an-
ually immediately after automatic reversing
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is ar isk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped: R
release the switch immediately ,o rR
press the switch in any direction during the
automatic closing process
The closing process is stopped. Operating the panoram ar oof with
power tilt/sliding panel
Opening and closing
C
To raise D
To open