2018 MERCEDES-BENZ CLA sensor

Searching for am obil ep hone
(device manager ). .......................... 234
see also Digital Operator's Man-
ua l. ................................................. 229
Telephony ...................................... 233
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Displa ym essage ............................ 197
Note s. ............................................ 318
Brake forc ed istribution
see EBD (electroni cb rake force
distribution)
Brake lamp
Replacing bulb s. ............................ 106
Brake lamps
Displa ym essage ............................ 202
Brakes
ABS .................................................. 61
BAS .................................................. 61
Brake fluid (notes) ......................... 318
Braking assistance appropriate to
the situation ..................................... 63
Displa ym essage ............................ 192
EBD .................................................. 67
Hil ls tart assis t. .............................. 125
HOLD function ............................... 157
Important safety notes .................. 146
Maintenance .................................. 147
Parking brake ................................ 142
Riding tip s. ..................................... 146
Warning lamp ................................. 219
Brakin ga ssistanc ea ppropriate to
the situation
Function/note s. ............................... 63
Breakdown
Where will If ind...? ........................ 269
see Fla tt ire
see Tow-starting
see Towing away
Button sont he steering wheel ......... 177
C
California
Important notice for retail cus-
tomers and lessees .......................... 25 Calling up am alfunction
see Displa ym essages
Car
see Vehicle
Care
Ca rw as h. ....................................... 262
Carpets .......................................... 268
Displa y. .......................................... 266
Exhaus tp ip e. ................................. 266
Exterior lights ................................ 265
Gear or selector lever .................... 267
Interior ........................................... 266
Matte finish ................................... 264
Note s. ............................................ 262
Paint .............................................. 263
Plastic trim .................................... 266
Power washe r. ............................... 263
Rear vie wc amera .......................... 265
Roof lining ...................................... 268
Sea tb el t. ....................................... 267
Sea tc ove r. .................................... 267
Sensors ......................................... 265
Steering whee l. .............................. 267
Tri mp ie ce s. ................................... 267
Washing by hand ........................... 262
Wheel s. .......................................... 264
Window s. ....................................... 264
Wipe rb lade s. ................................. 265
Woode nt rim .................................. 267
Carg oc om partmen te nl argement ... 240
Carg ot ie dow nr ings ......................... 241
CD
see also Digital Operator's Man-
ua l. ................................................. 229
CD player (on-board computer) ........ 183
Cente rc on sole
Lower section .................................. 36
Upper section .................................. 35
Central locking
Automati cl oc king (on-board com-
puter) ............................................. 187
Locking/unlocking (SmartKey ). ....... 70
Chang eofa ddress .............................. 26
Chang eofo wner ship .......................... 26
Changin gaw heel
Wh eels an dt ire s. ........................... 3086
Index

Remote control
Garag ed oo ro pener ....................... 252
Programming (garag ed oor
opener) .......................................... 252
Replacing bulbs
Brake lamp .................................... 106
High-beam headlamp s. .................. 106
Important safety notes .................. 104
Installing/removing the cover
(front whee la rch ). ......................... 105
Low-bea mh eadlamp s. ................... 105
Overview of bulb types .................. 104
Rear fog lamp ................................ 106
Turn signal s( front) ......................... 106
Turn signal s( rear) .......................... 106
Reporting safety defects .................... 28
Rescue card ......................................... 29
Reserve (fuel tank)
see Fuel
Reserve fuel
Displa ym essage ............................ 206
Warning lamp ................................. 224
see Fuel
Residual hea t( clim ate control) ........ 119
Restrain ts ystem
Displa ym essage ............................ 198
Introduction ..................................... 40
Warning lamp ................................. 224
Warning lamp (function) ................... 41
Revers eg ea r( selecto rl ever ) ........... 132
Reversin gf eature
Roller sunblind ................................. 87
Sid ew in dow s. .................................. 82
Roadside Assistance (breakdown) .... 26
Rolle rs unblind
Panorama roo fw it hp ower tilt/
sliding panel ..................................... 87
Roo fc arrier ........................................ 241
Roo fl inin ga nd carpets (cleaning
guidelines) ......................................... 268
Roo fl oa d( maximum) ........................ 320
Route guidance
see also Digital Operator's Man-
ua l. ................................................. 229 S Safety
Childre nint he vehicl e. .................... 54
see Occupant safety
Safety system
see Driving safety systems
SD card
Inserting ........................................ 235
Inserting/removing ........................ 235
Removing ....................................... 235
SD memory card
see also Digital Operator's Man-
ua l. ................................................. 229
Search &S en d
see also Digital Operator's Man-
ua l. ................................................. 229
Seat
Correct driver' ss ea tp osition ........... 90
Seat belts
Adjusting the height ......................... 44
Cleaning ......................................... 267
Correct usag e. ................................. 43
Fastening ......................................... 44
Important safety guideline s. ............ 42
Introduction ..................................... 41
Releasing ......................................... 44
Warning lamp ................................. 218
Warning lamp (function) ................... 44
Seats
Adjusting (electrically) ..................... 92
Adjusting (manually) ........................ 91
Adjusting (Performance Seat) .......... 94
Adjusting the 4-wa yl um ba rs up -
por t. ................................................. 93
Adjusting the hea dr estraint ............ 92
Cleaning the cove r. ........................ 267
Folding the backres t( rear com-
partment) forwards/back .............. 240
Important safety notes .................... 90
Sea th eating problem ...................... 95
Storing settings (memory func-
tion) ................................................. 99
Switching sea th eating on/of f. ........ 94
Securing cargo .................................. 241
Selecto rl ever
Cleaning ......................................... 267
Sensors (cleaning instructions) ....... 26516
Index

Objects in the vehicle interior may prevent
an air bag from functioning correctly. Before
starting your journey and to avoid risks resulting
from the speed of the air bag as it deploys, make
sure that: R
there are no people, animals or objects
between the vehicle occupant sa nd an air bagR
there are no object sb etween the seat, door
and B-pillar R
there are no hard objects, e.g. coat hangers,
hanging on the grab handles or coat hooks R
no accessories, such as cup holders, are
attached to the vehicle within the deployment
area of an air bag, e.g. to doors, side windows,
rear side trim or side walls R
no heavy, sharp-edged or fragile object sa re in
the pocket sofy our clothing. Store such
object sinas uitable place
G WARNING
If you modify the air bag cover or affix objects
such as stickers to it, the air bag can no longer
function correctly. There is an increased risk
of injury.
Never modify an air bag cover or affix objects
to it.
G WARNING
Sensors to control the air bags are located in
the doors. Modification sorw ork not per-
formed correctly to the doors or door panel-
ing, as well as damaged doors, can lead to the
function of the sensor sb eing impaired. The air
bags might therefore not function properly
anymore. Consequently, the air bags cannot
protec tv ehicle occupant sast hey are
designed to do. There is an increased risk of
injury.
Never modify the doors or parts of the doors.
Always have work on the doors or door pan-
eling carried out at aq ualified specialist work-
shop.
Front air bags
! Do not place heavy object sont he front-
passenger seat. This could cause the system
to identif yt he seat as being occupied. In the
event of an accident ,t he restraint systems on the front-passenger side may be triggered
and have to be replaced.
Driver's air bag C deploys in fron toft he steer-
ing wheel. Front-passenger fron ta ir bag D
deploys in fron tofa nd above the glove box.
When deployed, the fron ta ir bags offer addi-
tional head and thorax protection for the occu-
pants in the fron ts eats.
The PASSENGER AIR BAG OFF indicato rl amp
inform sy ou about the status of the front-
passenger fron ta ir bag ( Y
page 41).
The front-passenger fron ta ir bag will only
deploy if: R
the system, based on the OCS weight sensor
readings, detect st hat the front-passenger
seat is occupied ( Y
page 47). The
PASSENGER AIR BAG OFF indicato rl amp is
not lit ( Y
page 48) R
the restraint system control unit predict sa
high accident severity
Knee bags
Driver's knee bag C deploys under the steering
column and front-passenger knee bag D under
the glove box. The driver's and front-passenger
knee bags are triggered together with the front
air bags.46
Occupant safety
Safety

Important safety notes
i Observ et he "Importan ts afet yn otes "s ec -
tion ( Y
page 61).
G WARNIN G
If BA Sism alfunctioning ,t he braking distanc e
in an emergenc yb raking situation is
increased. Ther eisar is kofana ccident.
In an emergenc yb raking situation ,d epress
th eb rak ep edal wit hf ull force .A BS prevents
th ew heels from locking.
Braking X
Kee pt he brak ep edal firmly depressed until
th ee mergenc yb raking situation is over.
AB Sp revents th ew heels from locking.
The brakes will function as usual once you
release th eb rak ep edal .B AS is deactivated.
Active Brak eA ssist
General information
i Observ et he "Importan ts afet yn otes "s ec -
tion ( Y
page 61).
Active Brake Assist consist sofad istanc ew arn -
ing function wit hana utonomous braking func-
tion and situation-dependen tb raking assis-
tance
Active Brake Assist can help you to minimiz et he
ris kofac ol lision wit ht he vehicl et ra veling in
fron torr educe th ee ffects of suc hac ol lision .
If Active Brake Assist detects that there is ar is k
of collision ,y ou will be warned visually and
acoustically. If you do no tr eac ttot he visual and
audible collision warning ,a utonomous braking
can be initiate dinc riti cal situations. If you apply
th eb rak ey ourself in ac riti cal situation ,A da p-
tive Brake Assist support sy ou wit hs ituation -
dependen tb raking assistance.
Important safety notes
Detection of hazardous situation sc an be par-
ticularly impaired if: R
there is dirt on th es ensor sora nythin ge lse
covering th es ensor sR
there is snow or heav yr ainR
there is interferenc ebyo th er radar source s R
there are stron gr adar reflections, for exam-
ple in parking garages R
an arrow vehicl eist ra veling in front, e.g. a
motorbike R
av ehicl eist ra veling in fron tonad ifferen tl in eR
you are driving an ew vehicl eors ervicing on
th eA ctiv eB ra ke Assist system has jus tb een
carrie do ut
Observ et he important safet yn otes in th e
"Breaking-in notes" section ( Y
page 121).
Followin gd amag etot he fron te nd of th ev ehicle,
hav et he configuration and operation of th e
radar sensor checke dataq ualified specialist
workshop. This also applie stoc ol lision satl ow
speeds wher enov isible damag etot he fron to f
th ev ehicl eisa pparent.
Activating/deactivating Active Brake Assist is active after every ignition
cycle.
You can activat eord eactivat eA ctiv eB ra ke
Assist ( Y
page 185) in th eo n-bo ard computer.
When deactivated, th ed istanc ew arning func-
tion and th ea utonomous braking function are
also deactivated.
If Active Brake Assist is deactivated, th e

sensor technology to assess the traffic situa-
tion.
Situation-dependent braking assistance is capa-
ble of reacting to moving objects that have
alread yb een detected as such at least once
over the period of observation, up to vehicle
speeds of around 155 mph (250 km/h).
Situation-dependent braking assistance can
also detect stationary objects, up to vehicle
speeds of around 44 mph (70 km/h). X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally agai ni f:R
you release the brake pedal. R
there is no longer any danger of ac ollision.R
no obstacle is detected in front of your vehi-
cle.
Situation-dependent braking assistance is then
deactivated.
Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems ( Y
page 61).
G WARNING
Adaptive Brake Assist does not react: R
to people or animals R
to oncoming vehicles R
to crossing traffic R
when cornering
As ar esult, Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
G WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist might: R
intervene unnecessarily R
not intervene
There is ar isk of an accident. Always pay careful attention to the traffic sit-
uation and be ready to brake. Terminate the
intervention in an on-critical driving situation.
Due to the nature of the system, complex but
non-critical driving conditions may also cause
Active Brake Assist to intervene.
Even if Active Brake Assist is not available due to
am alfunction in the radar sensor system, the
brake system is still available with full brake
boosting effect and BAS.
ESP ®
(Electronic Stability Program)
General notes
i Observe the "Important safety notes" sec-
tion ( Y
page 61).
ESP ®
monitors driving stability and traction ,i .e.
power transmission between the tires and the
road surface.
If ESP ®
detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. The
engine output is also modified to keep the vehi-
cle on the desired course within physical limits.
ESP ®
assists the driver when pulling awa yo n
wet or slippery roads. ESP ®
can also stabilize
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
i Observe the "Important safety notes" sec-
tion ( Y
page 61).
ETS traction control is part of ESP ®
.Onv ehicles
with 4MATIC, 4ETS is part of ESP ®
.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
awa ya nd accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP ®
.
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 61).64
Driving safety systems
Safety

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

Changing th es ettings of th el ocking
system You can chang et he settings of th el ockin gs ys-
tem. This mean st ha to nl yt he driver' sd oor and
th ef uel fille rf lap are unlocked when th ev ehicle
is unlocked. This is useful if you frequently travel
on your own. X
To change th es etting: pres sa nd hold the
6 and 7 buttons simultaneousl yf or
approximately six seconds until th eb attery
indicator lamp flashes twice ( Y
page 73).
If th es ettin goft he lockin gs ystem is changed
within th es ignal range of th ev ehicle ,p ressing
the 7 or 6 button:R
locks or R
unlock st he vehicle
The SmartKey no wf unction sasf ollows:X
To unlock: pres st he 6 butto no nc e.X
To unlock centrally: pres st he 6 button
twice. X
To lock centrally: pres st he 7 button.
The KEYLESS-GO function is changed as fol-
lows: X
To unlock th ed ri ver's door: touch th ei nner
surface of th ed oor handle on th ed river's
door. X
To unlock centrally: touch th ei nner surface
of th ed oor handle on th ef ront-pa ssenger
door or th er ear door.X
To lock centrally: touch th eo uter sensor
surface on on eoft he door handles.X
To restor et he factor ys ettings: pres sa nd
hold the 6 and 7 buttons simultane-
ously for approximately six seconds until the
battery check lamp flashes twice
( Y
page 73).
Mechanica lk ey
General notes
If th ev ehicle can no longer be locke do r
unlocked wit ht he SmartKey or KEYLESS-GO,
use th em echanical key.
If you use th em echanical ke yt ou nlock and
open th ed river' sd oor or th et ru nk lid, th ea nti-
theft alarm system will be triggered ( Y
page 68). Ther ea re several ways to tur no ff th ea larm:X
To deactivat et he alarm with th ek ey: press
the 6 or 7 butto nont he key.
or X
Inser tt he SmartKey int ot he ignition lock.
or X
To deactivat et he alarm with KEYLESS-GO:
pres st he Start/Sto pb utto nint he ignition
lock. The SmartKey must be in th ev ehicle.
or X
Loc koru nlock th ev ehicle usin gK EY LESS-
GO. The SmartKey must be outside th ev ehi-
cle.
If you unlock th ev ehicle usin gt he mechanical
key, th ef uel fille rf lap will no tbeu nlocked auto-
matically. X
To unlock th ef ue lf ille rf lap: insert the
SmartKey int ot he ignition lock.
Removing th em echanica lk ey
X
Push release catch C in th ed irection of the
arrow and at th es ame tim er emove mechan-
ical key D from th eS ma rtKey.
For further informatio na bout:R
Unlockin gt he driver' sd oor ( Y
page 77)R
Unlockin gt he trunk ( Y
page 81)R
Lockin gt he vehicle ( Y
page 77)
Insertin gt he mechanica lk eyX
Push mechanical key D completely int ot he
SmartKey until it engages and release
catch C is back in its basic position.72
SmartKey
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