2018 MERCEDES-BENZ CLA warning

Diagnostics connection The diagnostic sc onnectio niso nl yi ntende df or
th ec onnectio nofd iagnostic equipmen tata
qualified specialis tw orkshop .
G WARNING
If you connec te quipmen ttoad iagnostic s
connection in th ev ehicle, it may affec tt he
operation of vehicle systems .Asar esult ,t he
operatin gs afet yo ft he vehicle could be affec -
ted. There is ar is kofana ccident.
Only connec te quipmen ttoad iagnostic sc on -
nection in th ev ehicle, whic hisa pproved fo r
your vehicle by Mercedes-Benz.
G WARNING
Objects in th ed river's footwell can restric tt he
peda lt ra ve loro bstruct ad epressed pedal.
The operatin ga nd road safet yo ft he vehicle is
jeopardized. There is ar is kofana ccident.
Mak es ur et ha ta ll objects in th ev ehicle are
stowed correctly, and that they canno te nter
th ed river's footwell. Install th ef loormat s
securely and as specifie dino rd er to ensur e
sufficien tc le aranc ef or th ep edals. Do no tu se
loose floormat sa nd do no tp lac ef loormat so n
to pofo ne another.
! If th ee ng in eiss witched of fa nd equipmen t
on th ed iagnostic sc onnectio nisu sed ,t he
starter battery may discharge.
Connectin ge quipmen ttot he diagnostic sc on -
nection can lead to emission sm onitor in gi nfor -
mation bein gr eset ,f or example. Thi sm ay lead
to th ev ehicle failin gtom ee tt he requirements of
th en ex te mission st es td urin gt he main inspec-
tion .
Qualified specialist workshop An authorized Mercedes-Ben zC ente risaq uali-
fie ds pecialis tw orkshop .Ith as th en eces sary
specialis tk no wledge ,t oo ls and qualification st o
correctl yc arry out th ew or kr equire dony our
vehicle. Thi sise specially th ec as ef or wor kr el -
evant to safety.
Observ et he note sint he Maintenance Booklet . Always hav et he followin gw or kc arrie do ut at an
authorized Mercedes-Ben zC enter:R
wor kr elevant to safet yR
servic ea nd maintenance wor kR
repair wor k R
alterations, installation wor ka nd modifica-
tion s R
wor kone lectronic component s
Correct us eIf you remov ea ny warnin gs tickers, you or oth-
ers could fail to recogniz ec ertai nd angers.
Leave warnin gs ticker sinp osition .
Observ et he followin gi nformati on when drivin g
your vehicle: R
th es afet yn otes in this manual R
technical dat af or th ev ehicleR
traffic rule sa nd regulation sR
laws and safet ys ta ndard sp ertainin gtom otor
vehicles
Problem sw it hy ou rv ehicleIf you should experience ap roblem wit hy our
vehicle, particularly on et ha ty ou believe may
affec ti ts saf eo peration ,weu rg ey ou to contact
an authorized Mercedes-Ben zC ente ri mmedi-
ately to hav et he problem diagnosed and recti -
fied. If th ep roblem is no tr esolved to your sat -
isfaction ,p lease discus st he problem again wit h
an authorized Mercedes-Ben zC ente ro r, if nec-
essary, contact us at on eoft he followin g
addresses.
In th eU SA
Customer Assistanc eC ente r
Mercedes-Ben zU SA ,L LC
3M ercedes Drive
Montvale, NJ 07645-0350
In Canad a
Customer Relation sD ep artmen t
Mercedes-Ben zC anada, Inc.
98 Vanderhoo fA venu e
Toronto ,O ntar io M4 G4 C9
Reporting safet yd efect s
US Ao nl y:28
Operating safety
Introduction

After am al functio nh as been rectified, the infor-
matio ni sd elete df rom the malfunctio nm emory
or is continuall yo verwritten.
Whe no pe rating the vehicle, situations ar ec on-
ceivabl einw hi ch thi st echnica ld at a, in connec-
tio nw it ho the ri nformatio n( if necessary ,u nder
consultatio nw it hana ut horize de xpert) ,c ould
be traced to ap er son.
Examples include: R
accident reports R
damage to the vehicle R
witness statements
Further additional functions tha th av eb ee nc on-
tractuall ya gr ee du po nw it ht he custome ra llow
certain vehicl ed at atobec onveye dbyt he vehi-
cle as well .T he additional functions include, for
example, vehicl el oc ation in cas eofane mer-
gency.
COMAND/mbrace If the vehicl eise quippe dw it hC OM AND or
mbrace ,a ddit ional data abou tt he vehicle's
operation, the us eoft he vehicl einc ertain sit-
uations, and the location of the vehicl em ay be
compiled throug hC OM AND or the mbrace sys-
tem.
For additional informatio np leas er efer to the
COMAND Use rM an ua lort he Digita lO perator's
Manua la nd/or the mbrace Terms and Condi-
tions.
Even td ata recordersThi sv ehicl eise quippe dw it hane vent data
recorde r( EDR). Thi sv ehicl eise quippe dw it ha n
event data recorde r( EDR). The main purpose of
an EDR is to record, in certain crash or near
crash-like situations, such as an ai rb ag deploy-
ment or hitting ar oa do bs tacle ,d at at ha tw il l
assist in understanding how av ehicle's systems
performed .T he EDR is designe dtor ecord data
relate dtov ehicl ed yn amics and safety systems
for as hort perio doft ime ,t ypicall y30s econds
or less.
The EDR in thi sv ehicl eisd esig ne dtor ecord
such data as: R
How various system siny ou rv ehicl ew er e
operating R
Whether or not the driver and passenger
safety belts were buckled/fastened R
How far (i fata ll )t he driver wa sd ep ressing the
accelerator and/or brake peda la ndR
How fas tt he vehicl ew as traveling.
These data can hel pp rovid eab et ter under-
standing of the circumstances in which crashes
and injurie so ccur. NOTE: EDR data ar er ecorded
by your vehicl eo nl yifan on-trivia lc rash situa-
tio no ccurs; no data ar er ecorde dbyt he EDR
under normal driving conditions and no personal
data (e.g. name, gender, ag ea nd crash location)
ar er ecorded. However, othe rp ar ti es, such as
l a we nforcement could combine the EDR data
with the typ eofp er sonally identifying data rou-
tinely acquired during ac rash investigation.
Acces stot he vehicl ea nd/or the EDR is needed
to rea dd at at ha ti sr ecorde dbyanE DR, and
specia le quipment is required .Ina ddit io ntot he
vehicl em an ufacturer ,o the rp ar tie st ha th av e
the specia le quipment ,s uc hasl aw enforce-
ment, can rea dt he informatio nb ya ccessing the
vehicl eort he EDR.
EDR data ma ybeu se dinc ivi la nd crimina lm at -
ters as at ool in accident reconstruction, acci-
dent claims and vehicl es af ety .S ince the Crash
Data Retrieva lC DR tool tha ti su se dtoe xtract
data from the EDR is commercially available,
Mercedes-Benz USA, LLC ("MBUSA" )e xpressly
disclaims any and al ll iabili ty arising from the
extractio noft hi si nformatio nb yu nauthorized
Mercedes-Benz personnel.
MBUSA will not share EDR data with others
withou tt he consent of the vehicl eo wn ers or, if
the vehicl eisl eased, withou tt he consent of the
lessee. Exceptions to thi sr epresentation
includ er esponses to subpoenas by la we nforce-
ment; by federal, state or local government; in
connectio nw it hora risin go ut of litigation involv-
ing MBUSA or its subsidiarie sa nd affilia tes; o r,
a s required by law.
Warning :T he EDR is ac omponent of the
Restraint System Module. Tampering with, alter-
ing ,m odifying or removing the EDR component
ma yr esul tina malfunctio noft he Restraint Sys-
tem Modul ea nd othe rs ys tems.
State laws or regulations regarding EDRs that
conflict with federa lr egulation ar ep re-empted.
Thi sm eans tha tint he event of such conflict, the
federa lr egulation governs .AsofF ebruar y2 013,
13 states have enacted laws relating to EDRs.30
Data stored in the vehicle
Introduction

Instrumen tc luster
Function Pag e
C
Speedometer wit hs egments 17 6
Warning and indicator lamps:
X Low-beam headlamps
10 1
` Parking lamp s
10 1
W High-beam headlamps
10 1

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

Restraint system warnin gl ampThe functions of the restraint system are
checke da fte rt he ignition is switched on and at
regular interval sw hile the engine is running.
Therefore, malfunctions can be detected in
goo dt ime.
The u restraint system warning lamp on the
instrument cluster lights up when the ignition is
switched on. It goe so ut no later than af ew sec-
onds afte rt he vehicl eiss tarted. The compo-
nents of the restraint system are in operational
readiness.
Am alfunction ha so ccurred if the u restraint
system warning lamp: R
doe sn ot light up afte rt he ignition is switched
on R
doe sn ot go ou ta fte raf ew seconds with the
engine running R
lights up agai nw hile the engine is running
G WARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or may not deplo ya s
intended during an accident. Thi sc an affect
for exampl et he Emergency Tensioning
Device or the ai rb ag .T hi sp oses an increased
ris kofi njury or eve nf ata li njury.
Have the restraint system checke da nd
repaired in aq uali fied specialist worksho pa s
soo na sp ossible.
PASSENGER AI RB AG indicator lamp
PASSENGER AIR BAG ON indicator lamp C and
PASSENGER AIR BAG OFF indicator lamp D are
part of the Occupant Classification System
(OCS). 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.
Depending on the person in the front-passenger
seat, the front-passenger front ai rb ag must
either be deactivated or enabled; see the fol-
lowing points. Yo um us tm ake sure of this both
before and during aj ourney.R
Childre ninac hild restrain ts ystem:
whethe rt he front-passenger front ai rb ag is
enabled or deactivated depends on the instal-
le dc hild restraint system, and the ag ea nd
size of the child .T herefore, be sure to observe
the notes on the "Occupant Classification
System (OCS)" ( Y
page 47 )a nd on "Chil-
dre nint he vehicle" ( Y
page 54). There you
wil l also find instructions on rearward and
forwa rd-facing child restraint systems on the
front-passenger seat. R
Al lo the rp ersons: depending on the classi-
fication of the person in the front-passenger
seat, the front-passenger front ai rb ag is ena-
bled or deactivated ( Y
page 47). Be sure to
observe the notes on "Seat
belts“ ( Y
page 41 )a nd "Ai rb ag s"
( Y
page 45). There yo uc an also find infor-
mation on the correct sea tp osition.
Seat belts
Introduction
Sea tb elts are the most effective means of
restricting the movement of vehicl eo ccupants
in the event of an accident or the vehicl er olling
over. Thi sr educe st he ris kofv ehicl eo ccupants
coming into contact with parts of the vehicle
interio rorb eing ejecte df rom the vehicle. Fur-
thermore ,t he sea tb el th elps to keep the vehicleOccupan ts afety 41
Safety Z

occupant in the best position in relation to the
air bag.
The seat belt system comprises: R
Seat belts R
Emergency Tensionin gD evices for the front
seat belts and the outer seat belts in the rear R
Seat belt force limiters for the front seat belts
and the outer seat belts in the rear
If the seat belt is pulled out of the belt outlet
quickly or with aj erk ym ovement ,t he belt
retractor locks. The belt strap cannot be extrac-
ted any further.
The Emergency Tensionin gD evice tighten st he
seat belt in an accident ,p ulling the belt close
against the body. However it does not pull the
vehicle occupant back in the direction of the
backrest.
The Emergency Tensionin gD evice does not cor-
rect an incorrect seat position or the routing of
an incorrectly fastened seat belt.
When triggered, as eat belt force limiter helps to
reduce the force exerted by the seat belt on the
vehicle occupant.
The seat belt force limiters for the front seats are
synchronized with the front air bags, which
absorb part of the deceleration force. This can
reduce the force exerted on the vehicle occu-
pants during an accident.
! If the front-passenger seat is not occupied,
do not engage the seat belt tongue in the
buckle on the front-passenger seat. Other-
wise, the Emergency Tensionin gD evice and
side impact air bag could be triggered in the
event of an accident and would need to be
replaced.
Important safety notes The use of seat belts and child restraint systems
is required by law in: R
all 50 states R
the U.S. territories R
the District of Columbia R
all Canadian provinces
Even where this is not required by law, all vehicle
occupant ss hould correctly fasten their seat
belts before starting the journey.
G WARNING
If the seat belt is not worn correctly, it cannot
perform its intended protective function. An incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
Always ensure that all vehicle occupant sh ave
their seat belts fastened correctly and are sit-
ting properly.
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)
G WARNING
The seat belt does not offer the intended level
of protection if you have not moved the back-
rest to an almost vertical position. When brak-
ing or in the event of an accident ,y ou could
slide underneath the seat belt and sustain
abdomen or neck injuries, for example. This
poses an increased risk of injury or even fatal
injury.
Adjust the seat properly before beginning
your journey. Always ensure that the backrest
is in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
G WARNING
Persons less than 5ft( 1.50 m) tall cannot
wear the seat belt correctly without an addi-
tional and suitable restraint system. If the
seat belt is not worn correctly, it cannot per-
form its intended protective function. An
incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
For this reason, alway ss ecure persons under
5ft( 1.50 m) tall in suitable additional restraint
systems.42
Occupant safety
Safety

If ac hild younger than twelve years old and
under 5ft( 1.5 0m)inh eight is travelin gint he
vehicle: R
always secur et he child in ac hild restraint
system suitable for this Mercedes-Ben zv ehi-
cle. The child restraint system must be appro-
priat etot he age, weight and size of the childR
always observe the instructions and safety
notes on "Children in the vehicle"
( Y
page 54) in addition to the child restraint
system manufacturer' si nstallation and oper-
atin gi nstructionsR
always observe the instructions and safety
notes on the "Occupant classification system
(OCS)" ( Y
page 47)
G WARNING
The seat belts may not perform their intended
protective function if: R
the ya re damaged, modified, extremely
dirty, bleache dord yedR
the seat belt buckle is damaged or
extremely dirty R
the Emergency Tensionin gD evices, belt
anchorage sori nertia reels have been modi-
fied.
Seat belts may be damaged in an accident,
althoug ht he damage may not be visible, e.g.
due to splinters of glass. Modifie dord amaged
seat belts may tear or fail, e.g. in an accident.
Modifie dE me rgency Tensionin gD evices
could accidentally trigger or fail to deploy
when necessary. This poses an increased risk
of injury or even fatal injury.
Never modif yt he seat belts ,E me rgency Ten-
sioning Devices, belt anchorage sa nd inertia
reels. Make sure that the seat belts are
undamaged, not worn out and clean .F ollow-
ing an accident ,h ave the seat belts checked
immediately at aq ualified specialist work-
shop.
Only use seat belts that have been approved for
your vehicle by Mercedes-Benz.
Sports seat or AMG Performance seat: this
seat is designed for the standard three-point
seat belt. If you install another multi-point seat
belt, e.g. sport or racin gs eat belts ,t he restraint system cannot provide the best level of protec-
tion.
G WARNING
If you feed seat belts through the opening in
the seat backrest ,t he seat backrest may be
damaged or may even break in the even tofa n
accident .T his poses an increased risk of
injury or even fatal injury.
Only use the standard three-point seat belt.
Never modif yt he seat belt system.
Proper use of th es eat beltsObserve the safet yn otes on the seat belt
( Y
page 42).
All vehicle occupant sm ust be wearin gt he seat
belt correctly befor eb eginnin gt he journey. Also
make sure that all vehicle occupant sa re always
wearing the seat belt correctly while the vehicle
is in motion.
When fastenin gt he seat belt, always make sure
that: R
the seat belt buckle tongue is inserted only
int ot he belt buckle belonging to that seat R
the seat belt is pulled tigh ta cross your body
Avoid wearing bulky clothing ,e .g. aw inter
coat. R
the seat belt is not twisted
Only the nc an the forces which occur be dis-
tributed over the area of the belt. R
the shoulder section of the belt is routed
across the center of your shoulder
The shoulder section of the seat belt should
not touc hy our nec korber outed under your
arm or behin dy our back .W here possible,
adjust the seat belt to the appropriate height. R
the lap belt is taut and passes across your lap
as low down as possible
The lap belt must always be routed across
your hip joints and not across your abdomen.
This applies particularly to pregnant women.
If necessary, push the lap belt down to your
hip join ta nd pull it tigh tu sing the shoulder
section of the belt. R
the seat belt is not routed across sharp, poin-
ted or fragile objects
If you have such item sl ocated on or in your
clothing ,e .g. pens ,k eys or eyeglasses ,s tore
these in as uitable place. R
only one perso nisu sing as eat beltOccupant safety 43
Safety Z

seconds or once the driver's seat belt is fas-
tened.
If the vehicle's speed exceeds 15 mph
(25 km/h) once and the driver's and front-
passenger seat belts are not fastened, aw arning
tone sounds. Aw arning tone also sounds with
increasing intensit yf or 60 seconds or until the
driver or front passenger have fastened their
seat belts.
If the driver or front passenger unfasten their
seat belts during the journey, the seat belt warn-
ing is activated again.
Air bags
Introduction The installation point of an air bag can be rec-
ognized by the AIRBAG marking.
An air bag complements the correctly fastened
seat belt. It is no substitute for the seat belt. The
air bag provides additional protection in appli-
cable accident situations.
Not all air bags are deployed in an accident. The
different air bag systems function independ-
ently from one another ( Y
page 52).
However, no system available today can com-
pletely eliminate injuries and fatalities.
It is also not possible to rule out ar isk of injury
caused by an air bag due to the high speed at
which the air bag must be deployed.
Important safety notes
G WARNING
If you do not sit in the correct seat position,
the air bag cannot protect as intended and
could even cause additional injury when
deployed. This poses an increased risk of
injury or even fatal injury.
To avoid hazardous situations, always make
sure that all of the vehicle's occupants: R
have fastened their seat belts correctly,
including pregnant women R
are sitting correctly and maintain the great-
est possible distance to the air bags R
follow the following instructions Always make sure that there are no objects
between the air bag and the vehicle's occu-
pants. R
Adjust the seats properly before beginning
your journey. Always make sure that the seat
is in an almost upright position. The center of
the head restraint must support the head at
about eye level. R
Move the driver's and front-passenger seats
as far back as possible .T he driver's seat posi-
tion must allow the vehicle to be driven safely. R
Only hold the steering wheel on the outside.
This allow st he air bag to be fully deployed. R
Always lean against the backrest while driv-
ing. Do not lean forward or lean against the
door or side window. You may otherwise be in
the deployment area of the air bags. R
Always keep your feet in the footwell in front
of the seat. Do not put your feet on the dash-
board, for example. Your feet may otherwise
be in the deployment area of the air bag. R
For this reason, always secure persons less
than 5f t( 1.50 m) tall in suitable restraint sys-
tems. Up to this height, the seat belt cannot
be worn correctly.
If ac hild is traveling in your vehicle ,a lso
observe the following notes: R
Always secure children under twelve years of
age and less than 5f t( 1.50 m) tal lins ui table
child restraint systems. R
Chil dr estraint systems shoul dbei nstalle do n
the rea rs ea ts. R
Onl ys ec ur eac hild in ar earward-facing child
restraint syste mont he front-passenge rs ea t
when the front-passenge rf ront ai rb ag is
deactivated .Ift he PASSENGER AIR BAG OFF
indicator lamp is permanentl yl it ,t he front-
passenge rf ront ai rb ag is deactivated
( Y
page 41). R
Alway so bser ve the instructions and safety
note sont he "Occupant Classification Syste m
( OCS) "( Y
page 47) and on "Children in the
vehicle" ( Y
page 54 )i na ddit io ntot he child
restraint syste mm an ufacturer's installation
and operating instructions.Occupant safety 45
Safety Z