2018 MERCEDES-BENZ CLA key battery

the househol dr ubbish .T hey
must be collected separately
and recycle dtop rotect the
environment.
Dispose of batteries in an
environmentall yf riendly
manner. Take discharged
batteries to aq uali fied spe-
cialist workshop or as pe cial
collectio np oi nt for used bat-
teries.
! Hav et he battery checked regularly at a
qualified specialis tw or kshop.
Observe the service intervals in the Mainte-
nanc eB ookle torc ontact aq uali fied specialist
workshop for mor ei nformation.
! Yo us houl dh av ea ll work involvin gt he bat-
tery carrie do ut at aq uali fied specialis tw or k-
shop. In the exceptiona lc as et ha titi sn eces-
sary for yo utod is connect the battery your-
self, make sure that: R
yo us wi tch off the engine and remove the
key .Onv ehicles with KEYLESS-GO, ensure
tha tt he ignition is switched off .C he ck that
al lt he indicator lamps in the instrument
cluste ra re off .O therwise, electronic com-
ponents ,s uc hast he alternator, ma yb e
damaged. R
yo uf irst remove the negative terminal
clamp and the nt he positive terminal
clamp. Never swap the termina lc lamps.
Otherwise, the vehicle' se le ctronic system
ma ybed amaged .R
in vehicles with automatic transmission,
the transmission is locked in position P
after disconnecting the battery .T he vehicle
is secur ed a gainst rolling away .Y ou ca
n
the nnol on ge rm ov et he vehicle.
The battery and the cove roft he positive ter-
minal clamp must be installe ds ec urel yd ur ing
operation.
Compl yw it hs af ety precautions and take pro-
tective measures when handling batteries. Risk of explosion.
Fire, open flames and smoking are
prohibited when handling the bat-
tery .A voi dc reating sparks.
Battery aci disc austic. Avoi dc ontact
with skin, eyes or clothing.
Wear suitabl ep rotective clothing,
especiall yg lo ves, apron and face-
guard.
Rinse any aci ds pills immediately
with clear water. Contact ap hysician
if necessary.
Wear ey ep rotection.
Kee pc hildren away.
Observe thi sO pe rator' sM an ual.
For safety reasons, Mercedes-Benz recom-
mend st ha ty ou onl yu se batteries which have
been tested and approved for your vehicl eb y
Mercedes-Benz. Thes eb at teries provide
increase di mpact protection to prevent vehicle
occupants fro ms uf ferin ga ci db ur ns shoul dt he
battery be damage dint he event of an accident.
In order for the battery to achieve the maximum
possibl es er vice life, it must always be suffi-
ciently charged.
Like othe rb at teries ,t he vehicl eb at tery may
discharge ove rt im eify ou do not us et he vehicle.
In thi sc ase, have the battery disconnecte data
qualified specialis tw or kshop .Y ou can also
charge the battery with ac harge rr ecommended
by Mercedes-Benz. Contact aq uali fied special-
is tw or kshop for furthe ri nformation.
Hav et he battery condition of charge checked
mor ef requentl yify ou us et he vehicl em ai nl yf or
short trip sorify ou leav eits tanding idle for a
length yp er iod. Consult aq uali fied specialist
workshop if yo uw is htol eave your vehicle
parked for al on gp er io doft ime.
Onl yr eplace ab at tery with ab at tery tha th as
been recommended by Mercedes-Benz.Battery (vehicle) 277
Breakdow na ssistance Z

Remove th eS ma rtKey if you park th ev ehicl e
and do no tr equire any electrical consumers.
The vehicl ew ill then use ver yl ittl ee ne rgy, thus
conserving battery power .
If th ep ower suppl yh as been interrupted, e.g. if
you reconnect th eb attery, you will hav et o:R
set th ec lock usin gt he multimedia system;
see th es eparat eo perating instruction sR
reset th ef unction for foldin gt he exterio rm ir -
ror si n/out automatically, by foldin gt he mir -
ror so ut once ( Y
page 97)
Charging th eb attery
G WARNIN G
During charging and jump-starting ,e xp losive
gase sc an escape from th eb attery. There is a
ris kofane xp losion .
Particularly avoi df ire, open flames, creating
sparks and smoking. Ensur et he re is sufficien t
ventilation while charging and jump-starting .
Do no tl ean ove rab attery.
G WARNIN G
Battery acid is caustic. There is ar is kofi njury.
Avoid contact wit hs ki n, eyes or clothing .D o
no ti nhale any battery gases. Do no tl ean ove r
th eb attery. Kee pc hi ldren away from batter-
ies. Wash away battery acid immediately wit h
plenty of clean water and seek medical atten -
tion .
G WARNIN G
Ad ischarged battery can freez eatt em pera-
tures belo wf re ezing point. When jump-start - ing th ev ehicl eorc ha rging th eb attery, gase s
can escape from th eb attery. There is ar is ko f
an explosion .
Allow th ef roze nb attery to thaw out before
charging it or jump-starting .
! Only use battery chargers wit ham aximum
charging voltag eo f1 4. 8V .
! Only charge th eb attery usin gt he jump-
starting connection point.
The jump-starting connection poin tisint he
engin ec om partmen t( Y
page 278).X
Open th eh ood. X
Connect th eb attery charge rtot he positive
termina la nd ground poin tint he sam eo rder
as when connecting th ed onor battery in th e
jump-starting procedure ( Y
page 278).
If th ei ndicator/warning lamp sdon ot ligh tupi n
th ei nstrumen tc luste ratl ow temperatures ,iti s
ver yl ikely that th ed ischarged battery has fro-
zen. In this cas ey ou may neither jump-start th e
vehicl en or charge th eb attery. The servic el ife of
at ha wed-out battery may be shorter. The start -
ing characteristics can be impaired, particularly
at low temperatures .H av et he thawed-out bat -
tery checke dataq ualified specialist workshop.
Only charge th ei nstalled battery wit hab attery
charge rw hic hh as been tested and approve db y
Mercedes-Benz .Ab attery charge ru ni ts p ecially
a
dapted for Mercedes-Benz vehicles and tested
and approve dbyM ercedes-Benz is available as
an accessory. It permit st he charging of th eb at -
tery in it si nstalled position .C ontac tana uthor-
ized Mercedes-Benz Cente rf or further informa-
tion and availability. Read th eb attery charger's
operating instruction sb efore charging th eb at -
tery.
Jump-starting
Fo rt he jump-starting procedure ,u se only th ej ump-starting connection point, consisting of ap os -
itive termina la nd ag round point, in th ee ng in ec om partment.
G WARNIN G
Battery acid is caustic. There is ar is kofi njury.
Avoid contact wit hs ki n, eyes or clothing .Don ot inhale any battery gases. Do no tl ean ove rt he
battery. Kee pc hi ldren away from batteries. Wash away battery acid immediately wit hp lenty of
clean water and seek medical attention .278
Jump-starting
Breakdown assistance

Make sure that: R
The jumper cables are not damaged. R
Non-insulated parts of the terminal clamps do not come into contact with other metal parts while
the jumper cables are connected to the battery. R
The jumper cables cannot come into contact with parts that can move when the engine is running,
such as the V-belt pulle yort he fan.X
Secure the vehicle by applying the electric parking brake. X
Shift the transmission to position ] .X
Turn the SmartKey to position Z in the ignition lock and remove it.X
Switch off all electrical consumers, e.g. rear window defroster, lighting, etc. X
Open the hood.
Position number

As ar ule, yo us houl dh av et he vehicl et rans-
ported. R
Towing the vehicl ew it hat ow rop eort ow bar.
Onl yt ow the vehicl eine xceptiona lc ases.
The battery must be connected and charged.
Otherwise, you: R
canno tt urn the SmartKe ytop osition H in
the ignition lock. R
canno tr elease the electri cp ar king brake.R
canno ts hift the transmission to position \\ .
The functio noft he electri cp ar king brake and
the parking lock is dependent on the on-board
voltage.
If the on-board voltag eisl ow or if ther eisas ys -
tem malfunction: R
the electri cp ar king brake ma yn ot be applied
in certain circumstances ,o rR
it ma ynol on ge rbep os sibl etos hift the trans-
mission to position ]
Switch off non-essentia lc onsumers, e.g .t he
radio.
Disar mt he automatic locking feature before the
vehicl eist owed ( Y
page 187). Yo uc ould other-
wise be locked ou tw he np us hing or towing the
vehicle.
Installing/removin gt he towin ge ye
Installing the towin ge ye
The brackets for the screw-i nt owing ey ea re
locate dint he bumpers. The ya re at the rea ra nd
at the front, under covers C . X
Remove the towing ey ef rom the stowage
space.
The towing ey eisl oc ate dw it ht he vehicl et ool
kit under the cargo compartment floor
( Y
page 270).
Vehicles with the TIREFIT kit: the towing ey ei s
beneath the tire inflation compressor
( Y
page 271). X
Press the mark on cover C inwards in the
direction of the arrow. X
Take cover C off the opening. X
Screw in the towing ey ec lockwise to the stop.
Removing the towin ge ye X
Unscrew and remove the towing eye. X
Attach cover C to the bumpe ra nd press until
it engages. X
Place the towing ey eint he stowag ew el l
beneath the cargo compartment floor in the
cargo compartment ( Y
page 270).X
Vehicles with the TIREFIT kit: pu tb ac kt he tire
inflation compressor ( Y
page 271).
Towin gt he vehicle with the fron ta xle
raised Observ et he important safety notes when tow-
ing your vehicl ew it ht he front axl er aised
( Y
page 281).
Only vehicle sw it hou t4 MATIC can be towed
with the fron ta xl er aised.
! Vehicles with 4MATIC must not be towed
with either the front or the rea ra xl er aised, as
doing so will damage the transmission.
Vehicles with 4MATIC ma ye it her be towed away
with both axles on the ground or be loaded up
and transported.
! The ignition must be switched off if the vehi-
cle is being towed with the front axl er aised.
Otherwise, ESP ®
ma yi ntervene and damage
the brake system. X
On vehicle sw it hK EYLESS -GO or the KEY-
LESS-GO start function: yo um us tu se the
SmartKe yi nstea doft he Start/Stop button
( Y
page 123). X
Make sure tha tt he vehicl eiss tationary.X
Turn the SmartKe ytop osit ion H in the igni-
tio nl oc k.282
Towin ga nd tow-starting
Breakdo wn assis tance

Note son4 MATIC vehicles
! Vehicle sw it h4 MATIC must not be towed
with eithe rt he front or the rea ra xl er aised, as
doing so will damage the transmission.
Vehicle sw it h4 MATIC ma yo nl ye it he rbet owed
away with both axles on the ground or be loaded
up and transported.
If the vehicle' st ransmission, front, or rea ra xl ei s
damaged, have the vehicl et ransporte dona
truck or trailer.
In the even to fd amag etot he electrical sys-
tem:
If the battery is defective, the automatic trans-
mission will be locked in position ] .Tos hift the
automatic transmission to position \\ ,y ou
must provide powe rtot he vehicle' so n-board
electrica ls ys te mint he same wa yasw he nj ump-
starting ( Y
page 278).
Have the vehicl et ransporte donat ransporte ro r
trailer.
Tow-startin g( em ergency engine
starting)
! Vehicle sw it ha ut omatic transmission must
not be tow-started .Y ou could otherwis ed am -
ag et he automatic transmission.
i Yo uc an find information on "Jump-starting"
under ( Y
page 278).
Fuses
Important safety notes
G WARNING
If yo um an ipulate or bridg eaf aulty fuse or if
yo ur eplace it with af us ew it hah ighe ra mper -
age, the electric cable sc ould be overloaded.
This could resul tina fire. There is ar is kofa n
accident and injury.
Alway sr eplace faulty fuse sw it ht he specified
new fuse sh avin gt he correc ta mperage.
! Onl yu se fuse st ha th av eb ee na pp roved for
Mercedes-Benz vehicles and which have the
correc tf us er at ing for the syste mc oncerned.
Onl yu se fuse sm ar ked with an "S" .O ther- wise ,c omponents or systems could be dam-
aged.
! Make sure tha tnom oisture can ente rt he
fuse bo xw he nt he cover is open.
! When closing the cover, make sure tha titi s
lying correctly on the fuse box. Moistur es eep-
ing in or dirt could otherwis ei mpair the oper-
ation of the fuses.
Th ef uses in your vehicl es er ve to close down
faulty circuits .Ifa fuse blows, al lt he compo-
nents on the circuit and their functions stop
operating.
Blown fuse sm us tber eplaced with fuse soft he
same rating ,w hi ch yo uc an recognize by the
color and value. Th ef us er at ing sa re liste dint he
fuse allocation chart.
Th ef us ea lloc at io nc h art is in the fuse bo xi nt he
front-passenge rf ootwell ( Y
page 285).
If an ewly inserte df us ea ls ob lows ,h av et he
cause traced and rectifie dataq ualified special-
is tw or kshop ,e .g .ana ut horized Mercedes-Benz
Center.
Before changin gaf use X
Secure the vehicl ea gain st rolling away
( Y
page 141). X
Switch off al le le ctrica lc onsumers.X
Vehicle sw it hout KEYLESS-GO: remove the
SmartKe yf ro mt he ignition lock. X
Vehicle sw it hK EYLESS -G Os tart-function
or KEYLESS-GO: open the driver's door.
Th ev ehicl ee le ctronics ar en ow in position
Z .T hi sc orresponds to the SmartKe yb ei ng
remove df ro mt he ignition.
Th ef uses ar el oc ated in variou sf us eb ox es:R
Fuse bo xint he engine compartment on the
left-hand side of the vehicle, when viewed in
the directio noft ravel R
Fuse bo xint he front-passenge rf ootwell
Th ef us ea lloc atio nc hart is on the fuse bo xint he
front-passenge rf ootwell ( Y
page 285).284
Fuses
Breakdow na ssistance