
RDistance Pilo tDISTRONIC must be activated.
#If indicator lamp 1is off: press button 2.
HOLD function
HOLD function
The HOLD function holds thev ehicle at astand‐
st ill without requ iring youtod epress theb rake pedal, suc
haswhen pulling away on steep
slopes.
Sy stem borders
The incline mus tnotbe grea tert han 30%.
Ac tivating/deactivatin gthe HOL Dfunction
&
WARNING Risk of an accident duetot he
HOLD function being acti vewhe nyou
lea vethev ehicle
If yo ul eave thev ehicle while onl ythe HOLD
function is braking thev ehicle, thev ehicle
can rollaw ay inthef ollowing situations:
RIfth er eisam alfunction in thes ystemo r
in thep owe rsupp ly.
RIf th eH OLD function is deactivated by
depressing thea ccelera torp edalort he
brak epedal, e.g. byavehicle occupant.
RIfth ee lectrics in thee ngine compart‐
ment ,the batter yorthe fuses ar etam‐
pered with.
RIf th eb atter yisd isconnected.
#Alwaysd eactivat ethe HOLD function
and secur ethe vehicle agains trolling
aw ay befor eleaving thev ehicle.
* NO
TEDama gefrom au tomatic braking
IfAc tiveB rake Assi st,D ista nce Pilot
DISTRONIC or theH OLD function is activa‐
te d, thev ehicle brakes automatically in cer‐
ta in situations.
To avo id damag etothevehicle, deactivate
th ese sy stems in thef ollowing or simila rsit‐
uations:
#During towing
#In ac arwa sh
PrerequisitesRThe vehicle is stationar y.
RThe engine is running or hasb eena utomati‐
cally switched of fbythe EC Ostart/s top
function.
RThe electric parking brak eisreleased.
RDistance Pilo tDISTRONIC is no tactivated.
16 8
Driving and pa rking

#Allow thee ngine tocool of fand thor‐
oughl yclean thee ngine oil from compo‐
nen tparts befor estartin gt he vehicle.
* NO
TEEngine damag ecaused byan
incor rect oil filter ,incor rect oil or addi‐
tives
#Do no tuse engine oil soroilfilters
whic hdon otcor respond tothes pecifi‐
cation sexplicit lyprescribed fort he
service inter vals.
#Do no talter thee ngine oil or oil filter in
order toachie velonger chang einter vals
th an prescri bed.
#Do notuse additives.
#Followt he instructions in thes ervice
inter vald ispla yregarding theo il
ch ange.
* NO
TEDama gecaused bytopping up too
muc hengine oil
Topping up toom uche ngine oil can cause
damag etothe engine or thec atalytic con‐
ve rter.
#Ha ve excess engine oil siphonedo ffat
aq ualified specialis tworks hop.
#Tu rn cap 1counter-clockwise and remo ve
it.
#Ad de ngin eoil.
#Replace cap 1and tur nitclockwise as far
as it will go.
#Chec kthe oil le vela ga in (→pag e281).
Checking coolant le vel
&
WARNING Risk of burn sfromh otcom‐
ponent parts in thee ngine compartment
Cer tain component parts in thee ngine com‐
partmen tcan be very hot, e.g. thee ngine,
th ec ooler and parts of thee xhaust system.
#Le tthe engine cool down and only
to uc ht he component parts described
as follo ws .
&
WARNING Danger of burn sfromh ot
coolant
The engine cooling sy stem is pressurized,
particularly when thee ngine is warm.Ify ou
282
Maintenance and care

It isrecommended that youh ave thet hawe d
batter ychec kedataq ualified specialis twork‐
shop.
All vehicles
* NO
TEDama gecaused bynumerouso r
ex tende dattem ptstos tart thee ngine
Nume rous or extende dattem ptstos tart the
engine ma ydamag ethe catalytic con verter
due tonon-combu sted fuel.
#Av oid numerous and extende dattem pts
to star tt he engine.
Obser vethef ollowing points during starting
assis tance and when chargingt he battery:
ROnlyuse undamaged jumper cables/charg‐
ing cables wit hanadequat ecross-section
and insulated term inal clamps.
RNon- insulated parts of thet erminal clamps
mus tnotcom eintoc ontact wi thother me tal
parts while thej umper cables/charging
cables ar econnected totheb atter yort he
jump-s tart connection point.
RThe jumper cables/charg ing cables mustnot
com eintoc ontac twitha nyparts whic hmay
mo vewhen thee ngine is running.
RAlw aysm akes uret hat neither youn orthe
batter yareelect rostaticall ycharged.
RKeep away from fire and open flames.
RDo no tlean overthe batter y.
RWhencharging: onlyuse batter ychar gers
te sted and appr ovedbyM ercedes-Benza nd
re ad theb atter ycharger's operating instruc‐
tions befor echarging theb atter y.
Obser vethea dditional following point sduring
st artin gassis tance:
RSt artin gassis tance ma yonly be pr ovided
using batteries wit hanominal voltag eof1 2
V.
RThe vehicles mus tnot to uch.
RGasoline engine: Onlyaccep tstartin ga ssis‐
ta nce if thee ngine and exhaus tsystema re
cold.
#Secur ethe vehicle byapplying thee lectric
parking brake.
#Au tomatic transmission: Shiftthet rans‐
mission toposition B.
#Makesuret hat thei gnition and all electrical
consumer sareswitched off.
#Open thee ngine hood.
#Slide co ver1 of positiv eterminal 2onthe
jump-s tarting connection point in thed irec‐
tion of thea rrow .
Breakdown assis tance 303

#Connect positiveterminal 2onyour vehicle
to thep ositiv epole of thed onor battery
using thej umper cable/charging cable.
Alw aysb egin wit hpositiv eclamp 2onyour
ow nv ehicle firs t.
#Du ring thes tarting assistance proce ‐
du re:st ar tt he engine of thed onor vehicle
and runati dles peed.
#Connect then egativ epole of thed onor vehi‐
cle and ground point 3ofyour ow nv ehicle
by usingt he jumper cable/charging cable.
Begin wit hthe donor batter yfirst .
#Du ring starting assist ance:star tt he
engine of your ow nv ehicle.
#During thec hargingp roce ss: star tt he
ch argingp rocess.
#During starting assist ance:lett he engines
ru nf or se veralm inutes.
#During starting assist ance:beforediscon‐
necting thej umper cables, switc honanelec‐
trical consumer on your ow nv ehicle, e.g. the
re ar wind owheater or thel ighting. When
thes tartin ga ssis tance/charging process
is compl ete:
#Fir st,r emo vethej umper cables/charging
cables from ground point 3and then ega‐
tiv ep ole of thed onor batter y,then from pos‐
itiv eterminal 2and thep ositiv epole of the
donor batter y.Begi neacht imew itht he con‐
ta cts on your ow nv ehicle firs t.
#Af terr emoving thej umper cables/charging
cables, close co ver1 of positiv eterminal
2.
Yo uc an obtain fur ther information on starting
assis tance at an yqualified specialis tworks hop.
To ws tarting or towing away
Towing away thev ehicle
Mercedes-Ben zrecommends transportin gyour
ve hicle in thec ase of abreakdown, rath er than
to wing it away. *
NO
TEDama getothev ehicle due to tow‐
ing away incor rectly
#Obser vethei nstruction sand no teso n
to wing away.
Pe rm itted towing me thods
RVe hicles wit htransmission damag emustb e
transpor ted(→pag e306).
RVehicles with automatic transmission:
onl yw ithb otha xlesont he ground.
R4MATIC vehicles: only wit hbotha xleso n
th eg round.
&
WARNING Risk of accident duetol imi‐
te ds afet y-re lated function sduring the
to wing process
Saf ety-re lated function sarelimited or no lon‐
ge ra vailable in thef ollowing situations:
Rthei gnition is switched off.
Rtheb rake system or po wersteering sys‐
te mism alfunctioning.
304
Breakdown assi stance

*NO
TEDama getothed rive trai ndueto
incor rect positioning
#Do no tposition thev ehicle abo vethe
connection point of thet ranspor tvehi‐
cle.
Installing thet ow ing eye
%
The towing eyeisp artoft hevehicle tool kit.
#Press them arkonc over 1 inwa rdsa nd
re mo ve.
#Scr ew inthet ow ing eye clockwise tothe
st op.
% Mak esuret hat co ver1 engages in the
bumper when your emo vethet ow ing eye. *
NO
TEDama gedue toincor rect us eof
th et ow ing eye
When atow ing eyeisu sedtoreco verav ehi‐
cle, thev ehicle ma ybedamaged in thep roc‐
ess.
#Onl yusethet ow ing eyetot owaway or
to ws tart thev ehicle.
Tows tarting thev ehicle (emer gency engine
st art)
* NO
TEDama getothea utomatic trans‐
mission due to towstarting
The automatic transmissionm aybe damaged
in thep rocess of tows tartin gv ehicles with
automatic transmission.
#Ve hicles wit hautomatic transmission
mus tnotbe tows tarted.
Breakdown assis tance 307

&WARNING ‑Riskoff irea nd injur yfrom
antifreeze
If antifreezec omes intocontact wi thhot
component parts in thee ngine compart‐
ment ,itmayignite.
#Allo wthe engine tocool down before
adding antifreeze.
#Make surethat no antifreeze spills out
next tothef iller opening.
#Thoroughl yclean of fany antifreeze
from component parts befor estarti ng
th ev ehicle.
* NO
TEDama gecaused byincor rect cool‐
ant
#Onl yadd coolant that has been pre‐
mixed wit hthe requ ired antifreeze pro‐
te ction.
Fu rther information on coolant
RIn theM ercedes-Benz Specification sfor
Operating Fluids 310.1, e.g. online at
http://be vo.mercedes-benz.com
RAt aq ualified specialis tworks hop
* NO
TEOverheating at high outsid etem‐
peratures
If an inappropriat ecoolant is used, the
engine cooling sy stem is no tsufficientl ypro‐
te cted agains toverheating and cor rosion at
high outside temp eratures.
#Alw aysu se an appropriat ecoolant.
Have thec oolant regularly changed at aqualified
specialis tworks hop.
The proportion of cor rosion inhibitor/antifreeze
concentrat einthe engine cooling sy stem should
be:
RAm inimum of 50% (antifreeze pr otection
down toappr oximatel y-35 °F (-3 7°C))
RAm aximum of 55% (antifreeze pr otection
down to-49 °F (-45 °C))
Fi lling capacities
Model Filling capacity
All models 12.7 US qt (12.0 l)
Note sonw indshield washer fluid
Obser vethen otes on operating fluids
(→pag e344).
&
WARNING ‑Riskoff irea nd injur yfrom
windshield washer concentrate
Wi ndshield washer concentrat eishighly
fl ammable. It coul dignit eifitc omes into
con tact wi thhote ngine component parts or
th ee xhaust system.
#Mak esuret hat no windshield washer
concentrat espills out next tothef iller
opening.
34 8
Tech nica ldata

Displaymessages
Possible causes/consequences and MSolutions
?
*Thefanm otorisf aulty.
#Avoiding high loads on thee ngine, driv eontothe neares tqualified specialis tworks hop. In doing so, ensur ethat
th ec oolant temp eratur edispla yremain sbelo w2 48 °F (120 °C).
#
See Operator's Manual *T
he batter yisnotbeing charge d.
* NO
TEPossible engine damag eifyou continue driving#Do no tcontin ue dr ivingunder an ycircum stances.
#Consult aqualified specialis tworks hop.
#Stop thev ehicle immediately ,paying attention toroad and traf ficc onditions ,and switc hoffthee ngine.
#Consult aqualified specialis tworks hop.
#
Start Engine See Opera-
tor's Manual *T
he engine is of fand theb atter ychar geleve list oo lo w.
#Switc hoffelectrica lconsumer sthat ar enotrequ ired.
#Leavethee ngine running foraf ewminutes, or driv efor alonger dis tance.
The batter yisbeing charge d.
Displa ymessages and warning/indicator lamps 37
9

Displaymessages
Possible causes/consequences and MSolutions
Â
Key Not Detected(red dis‐
pla ym essage) *T
he SmartK eycanno tbed etected and ma ynolonger be in thev ehicle.
The SmartK eyis no longer in thev ehicle and yous witch offt he engine:RYo uc an no longe rstart thee ngine.
RYouc anno tcentrall yloc kt he vehicle.
#Ensur ethat theS martK eyis in thev ehicle.
If th eS martK eydetection function hasam alfunction duetoastrongradio signal source:
#Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions.
#Place theS martK eyinthes towa ge compartment fors tartin gt he engine wit hthe SmartK ey.
Â
Key Not Detected (white
displa ymessage) *T
he SmartK eyis cur rently und etected.
#Chang ethe location of theS martK eyinthev ehicle.
#Ifth eS martK eyisstill no tbeing recognized, star tt he engine wit hthe SmartK eyinthes towa ge compartment .
Â
Don' tForget Your Key *A
warning tone also sounds. Thi smessage reminds youtot akey our keyw ithy ou when youl eave thev ehicle.
386
Displa ymessages and warning/indicator lamps