Page 343 of 498

00BBWhen givingstarting assis tance, al ways
make sure that you only connect bat‐
te ry term inals with identical polarity.
00BBDuring starting assis tance, you must
observ eth e described order for con‐
necting and disconnecting the jumper
cables.
00BBDo not connect or disconnect the bat‐
te ry cla mp s while the engine is running.
0071
WARNING Risk ofexplosion during
ch arging process and starting assis tance
During thech arging process and starting
assis tance, the battery may release an explo‐
sive gas mixture.
00BBAv oid fire , open flames, creating spar ks
and smoking.
00BBMake sure that there is suf ficient venti‐
lation du ring thech arging process and
during starting assis tance.
00BBDo not lean over a batter y.
Ifth e indicator/warning lamps in the instrument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has fro‐
zen.
0071 WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, batte rygas may be released.
00BBAlw aysth aw a frozen batte ryout firs t
before charging it or per form ing start‐
ing assis tance.
The service li feof a battery that has been
th awe d may be dramatically shor tened.
It is recommended that you ha veathaw ed bat‐
te ry checked at a qualified specialist workshop. All
vehicles
0075 NO
TEDama gecaused bynumerous or
ex tended attem ptsto start the engine
Nume rous or extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combu sted fuel.
00BBAv oid numerous and extended attem pts
to start the engine.
Obser vethefo llowing points during starting
assis tance and when charging the battery:
ROnly use undamaged jumper/charging
cables with a suf ficient cross-section and
insula tedte rm inal clamps.
RNon- insulated parts of thete rm inal clamps
must not come into con tact wi thother me tal
parts while the jumper/charging cable is
connected tothe battery/jump-s tart connec‐
tion point.
RThe jumper/charging cable must not come
into contact wi thany parts which may mo ve
when the engine is running.
Breakdown assist ance34
1
Page 344 of 498

RAlways make sure that nei ther you nor the
battery is elect rostatically charge d.
RKe ep away from fire and open flames.
RDo not lean overth e batter y.
RWhencharging: only use battery charge rs
te sted and appr ovedby Mercedes-Benz and
re ad the battery charge r's operating instruc‐
tions before charging the batter y.
Obser vethe additional following points during
st arting assis tance:
RSt arting assis tance may only be pr ovided
using batteries with a nominal voltage of
12 V.
RThe vehicles must not touch.
RGa soline engine: onlyaccept starting assis‐
ta nce if the engine and exhaust sy stem are
cold.
00BBSecure theve hicle byapplying the electric
parking brake.
00BBAu tomatic transmission: shiftthe transmis‐
sion toposition 005D.
00BBMake sure that the ignition and all electrical
consumers are switched off.
00BBOpen the hood.
00BBSlide co ver1 of positive clamp 2onthe
jump-s tarting connection point in the direc‐
tion of the ar row.
00BBConnect positive clamp 2onyour vehicle to
positive pole of the donor battery using the
jumper/charging cable. Alw ays begin with
positive clamp 2onyour ow nve hicle firs t.
00BBDu ring thest arting assist ance proce‐
dure: start the engine of the donor vehicle
and run at idle speed.
00BBConnect the negative pole of the donor bat‐
te ry and ground po int3 ofyour ow nve hicle
by using the jumper/charging cable. Begin
with the donor battery firs t.
00BBDu ring starting assist ance:start the
engine of your ow nve hicle.
00BBDuring thech arging process: start the
ch arging process.
00BBDuring starting assist ance:letthe engines
ru nfo r se veral minutes.
00BBDuring starting assist ance:before discon‐
necting the jumper cable, switch on an elec‐
trical consumer in your ow nve hicle, e.g. the
re ar wind owheater or lighting.
When thest arting assis tance/charging process
is compl ete:
34 2
Breakdown assis tance
Page 345 of 498
00BBFirst,re mo vethe jumper/charging cable
from ground point 3and negative pole of
th e donor batter y,then from positive clamp
2 and positive pole of the donor batter y.
Begin each time with the conta cts onyour
ow nve hicle firs t.
00BBAf terre moving the jumper/charging cable,
close co ver1 of positive clamp 2.Fu
rther information can be obtained at a quali‐
fi ed specialist workshop.
To w starting or towing away
Perm itted towing me thods
Mercedes-Benz recommends transporting your
ve hicle in the case of a breakdown, rath er than
to wing it away. 0075
NO
TEDama getotheve hicle due to tow‐
ing away incor rectly
00BBObser vethe instructions and no tes on
to wing away.
Breakdown assis tance 34
3