Jump
-starting G
WARNING Failure
tofollow thesedirections willcause damage tothe electronic componen ts,and canlead
to abattery explosion andsevere injuryordeath.
Never leanover batteries whileconnecting orjump startin g.You might getinjured.
Battery fluidcontains sulfuric acid.Donot allow thisfluid tocome incont actwith eyes, skinor
clothing. Incase itdoes, immediately flushaffected areawithwater, andseek medical helpif
necessary.
Ab attery will also producehydro gengas, whichis flam mable andexplosiv e.Keep flamesor
spar ksaway from battery, avoid improper connectiono fjumpe rcables, smoking,etc.
At tempt ingtojum pstart afroz en bat tery can result initexp lodin g,caus ingpers onalinj ury.
Read allinstruct ionsbefo reproc eedin g.
! Avoid repe atedand lengthy start ing attempt s.Ot her wise, non-com bust edfuel may
damage thecat alytic converter27
and creat earisk offire.
Do notu se arapid-charging devicetostart theengine.
Make surethejumper cablesarenot damage d.
Make surethejumper cablesarenot touching anyother metal objects whentheyare
conn ected tothe battery.
If your vehicle's batteryisdischarged, theengine canbejump-start edfrom another vehicle
or from asecond batteryusingjumper cables.
Observe thefollowi ngpoints:
X The battery isnot accessible inall vehicles. Ifthe other vehicle's batteryisnot accessible,
jump-start thevehicle usingasecond batteryorajump- start ing device.
X On lyjum p-start theveh iclewhen theen gin eis co ldand thecat alyti cconvert ersystem has
cooled down28
.
X Do not start theengine ifthe battery isfroz en.Let the battery thawfirst.
X Jump-start ingmay onlybeperformed frombatteries withanominal voltageof12 V.
X Only usejumper cableswhichhaveasufficient cross-section andinsulated terminalclamps.
X Make surethatthejumper cablescannotcome intocontactwith parts, suchasthe pulley
or the fan. These partsmove whentheengine isstart edand while itis runnin g.
X Ifthe battery isfully discharged, leavethebattery thatisbeing usedtojump-st artconn ected
for afew minutes beforeattempt ingtostart .This charges theempty battery alittle. i
Jumper
cablesandfurther information aboutjump-st artingcanbeobtained fromany
authorized Mercedes-Ben zCent er,for example.
X Make surethatthetwo vehicles donot touch.
X Secure thevehicle byapplying theelectr icparkin gbrake.
X Shift thetran smission toposition P.
27 Only vehicles withagasoline engine.
28 Only vehicles withagasoline engine. Jum
p-starting
341Breakdown assistance Z
X
Turn theSmart Keytoposition 0(Y page 139)inthe ignition lockandremove it.On vehicles
with KEYLE SS-GO, make suretheignition isswitched off(Ypage 139). Allindicator lamps
in the instr ument cluster mustbeoff.
X Switc hoff allelectric alcons umers (e.g.radio, blower, etc.).
X Open thehood (Ypage 312). Position
numberBidentifies thecharged batteryofthe other vehicle oran equivalent jump-
start ingdevice.
X Slide cover :ofpositive terminal; inthe direction ofthe arrow.
X Connec tpositive terminal; onyour vehicle topositive terminal= ofdonor battery B
using thejumper cable,beginning withyour ownbattery.
X Start theengine ofthe donor vehicle andrunitat idling speed.
X Connect negative terminal? ofdonor battery Btoearth pointAofyour vehicle using
the jumper cable,connectin gthe jumper cabletodonor battery Bfirst.
X Start theengine.
X Allow theengine torun forafew minutes beforedisconn ectingthe jumper cable.
X First ,remove thejumper cablefromearth pointAand negative terminal?, then from
positive terminal; and positive terminal=, each timedisconn ectingfrom thecont acts
on your ownvehicle first.
X Aft erremoving thejumper cable,closecover :onpositive terminal;.
X Have thebattery checkedataquali fiedspecialist workshop, e.g.anauthorized Mercedes-
Benz Center. Thejump-st artingprocedure isnot astandard operating state;therefor e,have
the battery checked. 342
Jum
p-startingBreakdown assistance
