key MERCEDES-BENZ CLA 2018 User Guide

Lowering ........................................ 311
Maintenance .................................... 26
Parking for al ong perio d. ............... 143
Pulling awa y. .................................. 125
Raising ........................................... 309
Reporting problems ......................... 28
Securing from rolling away ............ 309
Transporting .................................. 283
Unlocking (i nane mergency) ........... 77
Unlocking (SmartKey ). ..................... 70
Vehicl ed at a. .................................. 320
Vehicl ed ata
Roof load (maximum) ..................... 320
Trunk load (maximum) ................... 320
Vehicl ed imensions ........................... 320
Vehicl ee mergenc yl oc king ................ 77
Vehicl ei dentificatio nn umber
see VIN
Vehicl ei dentificatio np late .............. 314
Vehicl et oo lk it .................................. 270
Ventilation
Setting the vents ........................... 120
Video
Operating the DVD ......................... 183
see also Digital Operator's Man-
ua l. ................................................. 229
VIN
Sea t. .............................................. 315
Type plate ...................................... 314
W
Warning and indicator lamps
ABS ................................................ 220
Active Brake Assist ........................ 227
Brakes ........................................... 219
Check Engine ................................. 224
Coolant .......................................... 225
Distance warning ........................... 227
ESP ®
.............................................. 221
ESP ®
OFF ....................................... 222
Fue lt ank ........................................ 224
Overview .......................................... 33
PASSENGER AIR BAG ...................... 41
Reserve fue l. .................................. 224
Restraint system ............................ 224
Sea tb el t. ....................................... 218
SPOR Th an dling mod e. .................. 222 Tire pressure monitor .................... 228
Warning triangle ................................ 270
Warranty .............................................. 25
Washer fluid
Displa ym essage ............................ 216
Weather display (COMAND)
see also Digital Operator's Man-
ua l. ................................................. 229
Wheel and tire combinations
Tires ............................................... 312
Wheel bolt tightenin gt orque ........... 311
Wheel chock ...................................... 309
Wheels
Changing aw heel .......................... 307
Checking ........................................ 287
Cleaning ......................................... 264
Important safety notes .................. 287
Information on driving .................... 287
Interchanging/changing ................ 307
Mounting an ew whee l. .................. 310
Removing aw heel .......................... 310
Storing ........................................... 308
Tightening torque ........................... 311
Wheel size/tire size ....................... 312
Wheel sa nd tires
Changing aw heel .......................... 308
Window curtai na ir bag
Displa ym essage ............................ 199
Operation ......................................... 47
Windows
see Sid ew in dows
Windshield
Defrosting ...................................... 117
Windshiel dw asher system
Adding washe rf luid ....................... 260
Important safety notes .................. 319
Windshiel dw ip ers
Displa ym essage ............................ 216
Problem (malfunction) ................... 109
Replacing the wipe rb lade s. ........... 108
Switching on/of f. .......................... 107
Winter driving
Slippery roa ds ur faces ................... 148
Snow chains .................................. 290
Winter operation
Genera ln otes ................................ 289
Wi n
ter tires
M+S tire s. ...................................... 289Index 21

Introduction The printe dO perator's Manual provide si nfor-
mation about th es af eo peration of your vehicle.
The Digital Operator's Manual provide sc om pre-
hensiv ea nd specifically adapted information on
your vehicle's equipmen ta nd multimedia sys-
tem. You can call up th eD ig ital Operator's Man -
ual via th em ultimedia system.
i You will no ti ncur any cost sw hen calling up
th eD ig ital Operator's Manual. The Digital
Operator's Manual works without connecting
to th eI nternet.
Ther ea re three ways to access th et op ic soft he
Digital Operator's Manual: R
Visua ls earch
The visual search allows you to explor ey our
vehicl e" virtually". Starting from either th e
vehicl ee xter io rv ie wori nterio rv iew, you can
access man yoft he differen tt op ic sc ov ered
by th eD ig ital Operator's Manual. To access
th ev ehicl ei nterio rs ection ,s elect th e" Vehi-
cle interior" view. R
Keywor ds earch
The keyword search allows you to search for a
keyword by enterin gc ha racters.R
Content s
You can select individual section sint he con-
tents.
i The Digital Operator's Manual is deactiva-
te df or safet yr eason sw hile driving .
Operation
Calling up th eD igital Operator's Man-
ual X
Press th e

Panic alarm X
To activate: press and hold the
3 button C for approx. one second.
Av isual and audible alarm is triggered if the
alarm system is armed. X
To deactivate: press 3 button C again.
or X
Insert the SmartKey into the ignition lock.
or, in vehicles with KEYLESS-GO start-function
or KEYLESS ‑ GOX
Press the Start/Stop button.
The SmartKey must be in the vehicle.
Occupant safety
Introduction to the restraint system The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident.
The restraint system can also reduce the forces
to which vehicle occupants are subjected during
an accident.
The restraint system comprises: R
Seat belt system R
Air bags R
Child restraint system R
Child seat securing systems
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if, at all times, all
vehicle occupants: R
have fastened their seat belts correctly
( Y
page 43)R
have the seat and head restraint adjusted
properly ( Y
page 90) As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position ( Y
page 90).
You also have to make sure that an air bag can
inflate properly if deploye d( Y
page 45).
An air bag supplements ac orrectly worn seat
belt. As an additional safety device, the air bag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if, in the event of an accident, the protection
offered by the seat belt is sufficient, the air bags
are not deployed. When an accident occurs, only
the air bags that increase protection in that par-
ticular accident situation are deployed. How-
ever, seat belts and air bags generally do not
protect against object sp enetrating the vehicle
from the outside.
Information on restraint system operation can
be found under "Triggering of the Emergency
Tensioning Devices and air bags" ( Y
page 52).
See "Children in the vehicle" for information on
children traveling with you in the vehicle as well
as on child restraint systems ( Y
page 54).
Important safety notes
G WARNING
Modifications to the restraint system may
cause it to no longer work as intended. The
restraint system may then not perform its
intended protective function and may fail in an
accident or trigger unexpectedly, for example.
This poses an increased risk of injury or even
fatal injury.
Never modify parts of the restraint system.
Never tamper with the wiring, the electronic
components or their software.
If it is necessary to modify components of the
restraint system to accommodate ap erson with
disabilities, contact an authorized Mercedes-
Benz Center for details. USA only: for further
information contact our Customer Assistance
Center at 1-800-FOR-MERCedes
(1 ‑ 800 ‑ 367 ‑ 6372).
Mercedes-Benz recommends that you only use
driving aids which have been approved specifi-
cally for your vehicle by Mercedes-Benz.40
Occupant safety
Safety

Requirements To be classifie dc orrectly ,t he front passenger
mus ts it:R
with the sea tb el tf astened correctlyR
in an almost upright position with thei rb ac k
against the sea tb ac krestR
with thei rf ee tr esting on the floor, if possible
If the front passenger doe sn ot observe these
conditions ,O CS may produce af alse classifica-
tion, e.g. because the front passenger: R
transfers thei rw eigh tb ys uppo rting them-
selves on av ehicl ea rmrestR
sits in such aw ay that thei rw eigh tisr aised
from the sea tc ushion
If it is absolutely necessary to install ac hild
restraint system on the front-passenger seat, be
sure to observe the correct positioning of the
child restraint system. Neve rp la ce objects
under or behind the child restraint system, e.g. a
cushion. The entir eb as eoft he child restraint
system mus ta lway sr es tont he sea tc ushio no f
the front-passenger seat. The backrest of the
forward-facing child restraint system mus tl ie as
fla ta sp ossible against the backrest of the front-
passenger seat.
The child restraint system mus tn ot touch the
roo forbes ub jecte dtoal oa dbyt he head
restraint. Adjust the angle of the sea tb ac krest
and the hea dr estraint position accordingly.
Only then can OC Sbeg ua ranteed to function
correctly .A lway so bserve the child restraint sys-
tem manufacturer' si nstallation and o perating
i
nstructions.
Operatio nofO cc upant Classification
System (OCS)
C
PASSENGER AIR BAG ON indicator lamp
D
PASSENGER AIR BAG OFF indicator lamp The indicator lamps inform yo uw he the rt he
front-passenger front ai rb ag is deactivated or
enabled. X
Press the Start/Sto pb ut ton once or twice, or
turn the SmartKey to position G or H in the
ignition lock.
The system carrie so ut self-diagnostics.
The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamps mus tl ig ht up simul-
taneously for approximately six seconds.
The indicator lamps display the statu soft he
front-passenger front ai rb ag .R
PASSENGER AIR BAG ON lights up for 60 sec-
onds ,s ub sequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF) :t he
front-passenger front ai rb ag is able to deploy
in the event of an accident. R
PASSENGER AIR BAG OFF lights up :t he front-
passenger front ai rb ag is deactivated. It will
then not be deploye dint he event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator
lamp shows the statu soft he front-passenger
front ai rb ag .T he PASSENGER AIR BAG OFF
indicator lamp may be li tc ontinuously or be off.
If the statu soft he front-passenger front ai rb ag
changes whil et he vehicl eisinm otion, an ai rb ag
display message appears in the instrument clus-
ter ( Y
page 200). Whe nt he front-passenger
sea ti so ccupied, always pa ya ttention to the
PASSENGER AIR BAG OFF indica tor l amp. Be
a
ware of the statu soft he front-passenger front
ai rb ag both before and during the journey.
G WARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front ai rb ag is
disabled. It will not be deploye dint he event of
an accident and canno tp erform its intended
protectiv ef unction. Ap erson in the front-
passenger sea tc ould then, for example, come
into contact with the vehicle's interior, espe-
ciall yift he person is sitting too close to the
dashboard. Thi sp oses an increased ris ko f
injury or eve nf ata li njury.
Whe nt he front-passenger sea ti so ccupied,
always ensure that: R
the classification of the person in the front-
passenger sea ti sc orrect and the front-48
Occupan ts afety
Safety

G WARNING
If you leave children unsupervised in the vehi-
cle, they coul ds et it in motion by, for example:R
release the parking brake. R
shift the automatic transmission out of the
parking position P .R
start the engine.
In addition, they may operate vehicl ee quip-
ment and become trapped. There is ar isk of
an accident and injury.
When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
G WARNING
If persons, particularl yc hildren are subjected
to prolonged exposure to extreme hea to r
cold, there is ar isk of injury ,p ossibly even
fatal .N ever leave children unattended in the
vehicle.
G WARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularl yont he metal parts of the child
restraint system. There is ar isk of injury.
If you leave the vehicle, taking the child with
you ,a lway se nsure that the child restraint
system is not expose dtod irect sunlight. Pro-
tect it with ab lanket, for example. If the child
restraint system has been expose dtod irect
sunlight, let it cool dow nb efore securing the
child in it. Never leave children unattended in
the vehicle.
Always ensure that all vehicl eo ccupants have
their seat belts fastened correctly and are sitting
properly .P articular attention must be pai dt o
children.
Observe the safety notes on the seat belt
( Y
pag e4 2) and the notes on correct use of seat
belts ( Y
pag e4 3).
Ab ooster seat may be necessary to achieve
prope rs eat bel tp ositioning for children over
41 lbs (18 kg )u ntil they reach ah eight where a three-point seat bel tc an be properly fastened
without ab ooster seat.
Special seatbelt retractor
G WARNING
If the seat bel tisr eleased while driving, the
child restraint system wil lnol onger be
secure dp roperly .T he special seat bel tr etrac-
tor is disable da nd the inertia real draw sina
portion of the seat belt. The seat bel tc annot
be immediatel yr efastened. There is an
increased risk of injury ,p ossibly even fatal.
Stop the vehicl ei mmediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat bel tr etractor and secure the
child restraint system properly.
All seat belts in the vehicle, except the driver's
seat belt, are equipped with as pecial seat belt
retractor. When activated, the special seat belt
retractor ensure st hat the seat bel tc annot
slacken once the child seat is secured.
Installing ac hild restraint system: X
Make sure you observe the child restraint
system manufacturer's installation instruc-
tions. X
Pul lt he seat bel ts moothly from the bel to ut-
let. X
Engage seat bel tt ongue in bel tb uckle.
Activating the special seat bel tr etractor:X
Pul lt he seat bel to ut full ya nd let the inertia
reel retract it again.
Whil et he seat bel tisr etracting, you should
hear ar atcheting sound .T he special seat belt
retractor is enabled. X
Push the child restraint system dow nsot hat
the seat bel tist ight and does not loosen.
Removing the child restraint system and deac-
tivating the special seat bel tr etractor:X
Make sure you observe the child restraint
system manufacturer's installation instruc-
tions. X
Press the release button of the seat belt
buckle and guide the seat bel tt ongue back
toward st he bel ts ash guide.
The special seat bel tr etractor is deactivated.Children in the vehicle 55
Safety Z

Rearward-facin gc hild restraint systemIf it is absolutely necessary to install ar earward-
facing child restraint system on the front-
passenger seat, always make sure that the
front-passenger front ai rb ag is deactivated.
Only if the PASSENGER AIR BAG OFF indicator
lamp is permanently li t( Y
page 41 )i st he front-
passenger front ai rb ag deactivated.
Alway so bserve the child restraint system man-
ufacturer's installation and operating instruc-
tions.
Forward-facing child restraint system If it is absolutely necessary to install af orward-
facing child restraint system on the front-
passenger seat, always move the front-
passenger sea ta sf ar back as possible .F ully
retract the sea tc ushio nl en gth. The entir eb as e
of the child restraint system mus ta lway sr es to n
the sea tc ushio noft he front-passenger seat.
The backrest of the child restraint system must
li easf la ta sp ossible against the backrest of the
front-passenger seat. The child restraint system
mus tn ot touch the roo forbes ub jecte dtoal oa d
by the hea dr estraint. Adjust the angle of the
sea tb ac krest and the hea dr estraint position
accordingly .A lway sm ake sure that the shoul-
der bel ts tra pisc orrectly routed from the vehi-
cle bel to ut let to the shoulder bel tg uide on the
child restraint system. The shoulder bel ts trap
mus tb er outed forward and dow nf rom the vehi-
cle bel to ut let. If necessary, adjust the vehicle
bel to ut let and the front-passenger sea ta ccord-
ingly.
Alway so bserve the child restraint system man-
ufacturer's installation and operating instruc-
tions. Child-proof locks
Important safety notes
G WARNING
If children are traveling in the vehicle, they
could: R
ope nd oors, thu se ndangering othe rp eople
or roa du se rs R
exi tt he vehicl ea nd be caught by oncoming
traffic R
operate vehicl ee quipment and become
trapped
There is ar is kofana ccident and injury.
Alway sa ctivate the child-proof locks and
overrid ef eature if children are traveling in the
vehicle. Whe nl ea ving the vehicle, always take
the key with yo ua nd lock the vehicle. Never
leave children unattende dint he vehicle.
Overrid ef eature for: R
the rea rd oors ( Y
page 60) R
the rea rs id ew in dow s( Y
page 60)
G WARNING
If yo ul ea ve children unsupervised in the vehi-
cle ,t hey could set it in motion by ,f or example:R
release the parking brake. R
shift the automatic transmissio no ut of the
parking position P . R
star tt he engine.
In addition, they may operate vehicl ee quip-
ment and become trapped .T here is ar is ko f
an accident and injury.
Whe nl ea ving the vehicle, always take the
SmartKey with yo ua nd lock the vehicle. Never
leave children unsupervised in the vehicle.
G WARNING
If persons ,p ar ticularly children are subjected
to prolonged exposure to extreme hea to r
cold, there is ar is kofi njury, possibly even
fatal. Neve rl ea ve children unattende dint he
vehicle.Childre nint he vehicle 59
Safety Z

You should therefore adapt your drivin gs tyle
to the differen th andlin gc haracteristics. Have
the brak es yste mc hecked at aq ualified spe-
cialist workshop.
Please observ et he information on warnin ga nd
indicator lamps ( Y
page 220)
( Y
page 220) as well as on display messages
( Y
page 194).
ADAPTIVE BRAKE ADAPTIVE BRAKE enhances braking safet ya nd
offers increased braking comfort .Ina ddition to
the braking function ,A DA PTIVE BRAKE also has
the HOL Df unction ( Y
page 157) and hill start
assist ( Y
page 125).
STEER CONTROL
Genera li nformationSTEER CONTROL helps you by transmitting a
noticeable steerin gf orc etot he steerin gw heel
in the direction required for vehicle stabilization.
This steerin ga ssistanc eisp rovided in particular
if: R
both right wheels or both left wheels are on a
wet or slippery road surfac ew hen you brakeR
the vehicle begins to skid
Important safet yn otes
i Observe the "Importan ts afet yn otes" sec-
tion ( Y
page 61).
No steerin ga ssistanc eisp rovided from STEER
CONTROL, if: R
ESP ®
is malfunctioningR
the steerin gism alfunctioning
If ESP ®
is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer
The immobilizer prevent sy our vehicle from
being started without the correc tS martKey. X
To activat ew ith th eS martKey: remove the
SmartKey from the ignition lock. X
To activat ew ith KEYLESS-GO start-func-
tion or KEYLESS-GO: switc ht he ignition off
and open the driver's door. X
To deactivate: switc hont he ignition.
When leaving the vehicle, always tak et he
SmartKey with you and lock the vehicle. Anyone
can star tt he engin eifav alid SmartKey has been
left inside the vehicle.
i The immobilizer is always deactivate dw hen
you star tt he engine.
In the even tt hat the engin ec annot be started
(yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized
Mercedes-Ben zC enter or call
1-800-FOR-MERCedes (in the USA )o r
1-800-387-010 0( in Canada).
ATA (anti-theft alar ms ystem)
X
To arm: lock the vehicle with the SmartKe yo r
KEYLESS-GO.
Indicator lamp C flashes. The alarm system
is armed after approximately 15 seconds. X
To disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or X
Insert the SmartKe yi nt ot he ignition lock.
Av isual and audible alarm is triggered if the
alarm system is armed and you open: R
ad oor R
the vehicle with the mechanical key R
the trun kl id R
the hood68
Protection against theft
Safety

X
To turn the alarm off with the SmartKey:
press the 6 or 7 button on the Smart-
Key.
The alarm is stopped.
or X
Vehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock ( Y
page 122).X
Insert the SmartKey into the ignition lock.
The alarm is stopped. X
To sto pt he alarm using KEYLESS-GO:
grasp the outsid ed oo rh an dle. The SmartKey
must be outsid et he vehicle.
The alarm is stopped.
or X
Press the Start/Stop button on the dash-
board .T he SmartKey must be insid et he vehi-
cle.
The alarm is stopped.
The alarm is not switched off, eve nify ou close
the open door tha tt riggered it, for example.
i If the alarm continue sf or more than
30 seconds ,t he mbrace emergency cal ls ys -
tem automaticall yn otifie st he Customer
Assistance Center. Thi sisd on ee it her by text
message or data connection.
The emergency cal ls ys tem send st he mes-
sage or data provided that: R
yo uh av es ub scribed to the mbrace service.R
the mbrace service ha sb ee na ctivated
properly. R
the necessary mobil ep hone network is
available. Protectio na gains tt heft 69
Safety Z

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

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