2019 MERCEDES-BENZ CLA COUPE charging

Only
replace abattery withabattery thathas
been recommended byMercedes-Benz .
Remove theSmartKey ifyou park thevehicle
and donot require anyelectrical consumers.
The vehicle willthen usevery little energy, thus
conserving batterypower.
If the power supply hasbeen interrupted, e.g.if
you reconnec tthe battery, youwillhave to:
R set the clock using themultimedia system
(see theDigital Operator's Manual)
R reset thefunction forfolding theexterior mir-
rors in/out automaticall y,by folding themir-
rors outonce (Ypage 98) Charging
thebatter y G
WARNING
During charging andjump-startin g,explosive
gases canescape fromthebattery. Thereisa
risk ofan explosion.
Particularl yavoid fire,open flames, creating
sparks andsmoking. Ensurethereissufficient
ventilation whilecharging andjump-startin g.
Do not lean over abattery. G
WARNING
Battery acidiscaustic. Thereisarisk ofinjury.
Avoid contactwith skin, eyesorclothing. Do
not inhale anybattery gases.Donot lean over
the battery. Keepchildren awayfrom batter-
ies. Wash awaybattery acidimmediately with
plenty ofclean water andseek medical atten-
tion. G
WARNING
A discharged batterycanfreeze attempera-
tures below freezing point.Whenjump-start-
ing the vehicle orcharging thebattery, gases
can escape fromthebattery. Thereisarisk of
an explosion.
Allow thefrozen battery tothaw outbefore
charging itor jump-startin g.
! Only
usebattery chargers withamaximum
charging voltageof14.8 V.
! Only
charge thebattery usingthejump-
starting connectionpoint. The
jump-startin gconnec tionpoint isin the
engine compartment (Ypage 282).
X Open thehood.
X Connect thebattery charger tothe positive
terminal andground pointinthe same order
as when connec tingthedonor battery inthe
jump-startin gprocedure (Ypage 282).
If the <004C00510047004C004600440057005200550012005A004400550051004C0051
004A[ lampsdonot light upin
the instrument clusteratlow temperatures, itis
very likely thatthedischarged batteryhasfro-
zen. Inthis case youmay neither jump-start the
vehicle norcharge thebattery. Theservice lifeof
a thawed-out batterymaybeshorter. Thestart-
ing characteristics canbeimpaired ,particularl y
at low temperatures. Havethethawed-out bat-
tery checked ataqual ified speciali stworkshop.
Only charge theinstalled batterywithabattery
charger whichhasbeen tested andapproved by
Mercedes-Benz .A battery charger unitspeciall y
adap tedforMercedes-Benz vehiclesandtested
and approved byMercedes-Benz isavail able as
an accessory. Itpermits thecharging ofthe bat-
tery inits installed position. Contactanauthor-
ized Mercedes-Benz Centerforfurther informa-
tion andavail ability. Read thebattery charger's
operating instructionsbefore charging thebat-
tery. Replacing
the12Vbatter y
Observe thenotes onthe 12Vbattery
(Y page 279).
Mercedes-Benz recommendsthatyouhave the
12 Vbattery replaced ataqual ified speciali st
workshop, e.g.atan authorized Mercedes-Benz
Center.
If you want toreplace thebattery yourself,
observe thefollowi ngnotes:
R Alway sreplace adefective batterywithabat-
tery which meets thespecific requirements of
the vehicle.
The vehicle isequip pedwith abattery using
AGM (absorbe ntglass mat)technology ora
battery usingEFB(enhanced floodedbattery)
technology. Fullvehicle functionality isguar-
anteed onlywith anAGM orEFB battery. If
replacement isnecessary, alwaysuse thebat-
tery technology originallyinstalled. Switching
between thebattery technologies isnot per-
mitted. Forsafety reasons, Mercedes-Benz
recommends thatyouonly usebatteries Bat
tery (vehic le)
281Breakdown assistance Z

which
havebeen tested and approv edfor your
vehic leby Merc edes- Benz.
R Use detachable partssuch asbreat herhose s,
angle dcon nectingpiece sor ter min alcov ers
fro mthebatt erywhich isto be replac ed.
R Make surethat theven those isalways con-
nec ted totheorigi nalopen ingonthebatt ery
side. R
Inst all exis tingor supplied cellcaps ;oth er-
wise gases orbatt eryacid could escape.
R Make surethat thedet achabl epart sare con-
nec ted again inthesame way. Jum
p-sta rting
For thejum p-startingproc edure, useonly thejum p-startingcon nectionpoin t,con sisting ofapos-
itiv eter min aland agroun dpoin t,in theeng inecom partmen t. G
WAR
NING
Bat teryacid iscaust ic.Ther eis arisk ofinjury.
Av oid contactwith skin, eyes orclot hing.Do not inhale any batterygases. Donot lean over the
batt ery. Keep children away frombatt eries .Wash awaybatteryacid imme diatelywith plentyof
clean water andseek medic alatt ent ion. G
WAR
NING
Dur ing char ging andjump-starting,exp losiv egases canescape fromthebatt ery. Ther eis arisk
of an exp losion .
Part icular lyavoid fire,open flames,creatin gspark sand smok ing.Ensure there issuff icien tven -
tilat ionwhile charging andjump-starting.Do not lean over abatt ery. G
WAR
NING
Dur ingthechar ging process, abatt eryproduc eshydrog engas. Ifashor tcir cuit occurs orspark s
are create d,thehydrog engas can ignite.Ther eis arisk ofan exp losion .
R Make surethat theposit ivetermin alof acon nected batt erydoes notcom eint ocon tactwith
vehic lepart s.
R Nev erplace metalobj ect sor too lson abatt ery.
R Itis impor tantth at you obser vethedesc ribed orderof thebatt erytermin alswhen connecting
and disconnecting abatt ery.
R When jump-starting,mak esure that thebatt erypoles withidenticalpolarit yare connected.
R Itis part icular lyimpor tantto obser vethedesc ribed orderwhen connectingand disconnecting
th ejum per cables .
R Nev ercon nector disc onnect thebatt erytermin alswhile theeng ineisrun ning. G
WAR
NING
A disc harge dbatt erycan freeze attem perat uresbelow freezin gpoin t.When jump-startingth e
vehic leor char ging thebatt ery, gases canescape fromthebatt ery. Ther eis arisk ofan exp losion .
Allo wthefro zen batterytothaw out befo rechar ging itor jum p-starting.
! Av
oid repeat edand lengthyst art ing attempt s.Ot herwis e,thecat alytic converter could be
damaged bythenon -combus tedfuel. 282
Jum
p-sta rtingBr eakd ownassis tance

If
the indicator/wa rninglampsdo not light upinthe instrument clusteratlow temperature s,itis very
likely thatthedischa rgedbattery hasfrozen. Inthis case youmay neither jump-start thevehicle nor
charge thebattery. Letthe battery thawfirst.Theservice lifeofathawed -outbattery maybeshorter.
The starting characteristics canbeimpa ired,particul arlyatlow temperature s.Have thethawed -out
battery checked ataqua lifiedspecia listworkshop.
Do not start thevehicle usingarapi dcharging device.Ifyou rvehicle 'sbattery isdischa rged,the
engine canbejump-started fromanother vehicleorfrom asecond batteryusingjumper cables.
Observe thefollow ingpoints:
R The battery isnot accessib lein all vehicle s.Ifthe other vehicle 'sbattery isnot accessib le,jump-
start thevehicle usingasecond batteryorajump-starting device.
R You may onlyjump-start thevehicle whentheengine andexhau stsystem arecold.
R Do not start theengine ifthe battery isfrozen. Letthe battery thawfirst.
R Only jump-start frombatteries witha12 Vvoltage rating.
R Only usejumper cablesthat arenot dama gedand have asufficie ntcross-section andinsula ted
terminal clamps.
R Make surethatthetwo vehicle sdo not touch.
Make surethat:
R The jumper cablesare not dama ged.
R Non-insula tedparts ofthe terminal clampsdonot come intocontact withother metal partswhile
the jumper cablesare connected tothe battery.
R The jumper cablescannot comeintocontact withparts thatcanmove whentheengine isrunning,
such asthe V-belt pulley orthe fan.
X Secure thevehicle byappl ying theelectric parking brake.
X Shift thetransmission topositio n005D.
X Turn theSmartKey topositio n005A inthe ignition lockandremove it.
X Switch offallelectrical consumers, e.g.rear window defroster, lighting,etc.
X Open thehood. Jump-st
arting
283Breakd ownassis tance Z