
Non-operational times wit hthe batter ydis‐
connected
The AS SYST PLUS service inter vald isplay
can onl ycalculat ethe serviced uedate when
th eb attery is connected.
#Notedown thes ervice due dat edispla yedo n
th ei nstrument displa ybefor edisconnecting
th eb atter y(
→page319).
Engine co mpartment
Activ eh ood( pedestrian pr otection)
Operation of thea ctiv ehood (pedestrian pro‐
te ction)
In cer tain accident situations ,the risk of injury
to pedestrians can be reduced bythea ctuation
of thea ctiv ehood. The rear area of thee ngine
hood is raised byappr oximatel y85m m.
Fo rthe driv etotheworkshop, rese tthe trig‐
ge reda ctiv ehood yourself.Ift he activehood
has been triggered, pedestrian pr otection may
be limited. Aq
ualified specialis tworks hop mus tre-ins tate
th ef ull functionality of thea ctiv ehood.
The activ ehood is no tavailable in all countries.
Re setting thea ctiv ehood
&
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 .
#With your handf lat, push down activ ehood
1 inthea reaa round theh inges on bo th
sides (ar rows).
The hood mus tengag einp osition.
#Ifth ea ctiv ehood can be raised slightly at
th er ear in thea reaoft he hinges, repeat the
st ep until it engages cor rectl y.
Opening/closing theh ood
&
WARNING Risk of accident if thee ngine
hood is unlatched while driving
An unloc kede ngin ehood ma yopen up when
th ev ehicle is in motion and bloc kyour vie w.
#Neveru nlatc hthe engine hood while
driving.
#Befor eevery trip, ensur ethat the
engine hood is latched.
320 Maintenanc eand care

&WARNING Risk of accident and injury
when opening and closing thee ngine
hood
When opening or closing thee ngine hood, it
ma ysuddenl ydropi ntot he end position.
Ther eisar isk of inju ryfora nyo ne in the
engine hood's rang eofm ovement.
#Onlyopen or close thee ngine hood
when ther ea reno persons in the
engine hood's rang eofm ovement.
&
WARNING Danger of burn swhen open‐
ing theh ood
If yo uo pen theh ood when thee ngine has
ove rheated or during afireint he engine
compartment, youc ouldcome int ocontact
wit hh otgases or other escaping operating
fl uids.
#Befor eopening theh ood, allo wthe
engine tocool down.
#Inthee vent of afireint he engine com‐
partment, keep theh ood closed and
call thef ires ervice.
&
WARNING Risk of injury duetomoving
parts
Cer tain component sinthe engine compart‐
ment ma ycontinue tomo veor suddenly
mo veagain evenafter thei gnition has been
switched off, e.g. thec ooler fan.
Make sureoft hefollowing befor eperform ing
ta sk sint he engine compartment:
#Switc hthe ignition off.
#Ne vertouc hthe danger zone sur round‐
ing movin gcomponent pa rts, e.g. the
ro tatio na reaoft hefan.
#Re mo vejewe lrya nd watches.
#Keep items of clo thing and hair away
from moving parts.
& WARNING Risk of injury fromtouching
co mp onent parts under voltage
The ignition sy stem and thef uel injection
sy stem workunder high voltage. If yout ouch
component parts whic hareunder voltage,
yo uc ouldreceive an electric shoc k.
#Nevertouc hcomponent pa rtso fthe
ignition sy stem or thef uel injection sys‐
te mw hen thei gnition is switched on.
&
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 .
Maintenance and care 321

&WARNING Risk of injury from usingthe
windshield wiper swhile thee ngine hood
is open
When thee ngine hood is open and thew ind‐
shield wiper saresetinm otion ,you can be
trappe dbythe wiper linkage.
#Alw ayss witc hoffthew indshield wipers
and ignition befor eopening thee ngine
hood.
#To open: pull lever1 torelease thee ngine
hood.#Push hood catch 1upwards and lif tthe
hood byappr oximatel y15in( 40 cm).
#Toclose: lowe rthe hood and le titfall from a
height of appr oximatel y8in (20 cm).
#Ifth eh ood can still be lif teds lightl y,open
th eh ood again and close it wit halittle more
fo rc eu ntil it engages cor rectl y.
322
Maintenanc eand care

partmentand trunk ,onlyu sethose fuses
mar kedw ithan" S". The fuse rating sarelist ed in
th ef use assignmen tdiagram.
Fu se assignment diag ram: onthef use bo xin
th et runk (
→pag e353).
* NO
TEDama geor malfunctions caused
by moisture
Moistur emaycause dama getothee lectrical
sy stem or cause it tomalfunction.
#When thef use bo xisopen, mak esure
th at no moistur ecan enter thef use
box.
#When closing thef use box, mak esure
th at thes eal of thel id is positioned cor‐
re ctly on thef use box.
Ifth en ewlyinser tedf use also blo ws,have the
cause trace dand rectifie dataq ualified special‐
is tw orks hop, e.g. aMercedes-Benz Service Cen‐
te r.
Ensure thef ollowing befor ereplacing afuse:
RThe vehicle is secured agains trolling away.
RAll electrica lconsumer sareswitched off.
RThe ignition is switched off.
The electrica lfus es ar eloc ated in various fuse
bo xes:
RFu se bo xont he driver's side of thee ngine
compartmen t(→page351)
RFu se bo xont he driver's side of thec ockpit
(→pag e352)
RFuse bo xinthe front passenger foot we ll
(→pag e352)
RFuse bo xinthe trunk on ther ight-hand side
of thev ehicle, when vie wedint he direction
of tr avel(
→pag e353)
Fuse bo xinthe engine compartment
Obser vethen otes on electrical fuses
(→pag e350).
Re quirements:
RYoun eedad ryclo thand ascrew driver. Opening
&
WARNING Risk of injury from usingthe
windshield wiper swhile thee ngine hood
is open
When thee ngine hood is open and thew ind‐
shield wiper saresetinm otion ,you can be
trappe dbythe wiper linkage.
#Alw ayss witc hoffthew indshield wipers
and ignition befor eopening thee ngine
hood.
Breakdown assis tance 351