openthec ap, youc ould be scalded byhot
coolant spr aying out.
#Le tthe mo torc ool down befor eopening
th ec ap.
#When opening thec ap, wearglove sand
pr otectiv eeyewe ar.
#Slowl yturnt he cap half aturntoa llow
pressur etoescape.
#Park thev ehicle on alevel sur face.
#Chec kthe coolant temp eratur edispla yint he
instrument clus ter.
The coolant temp eratur emustbeb elow
15 8°F( 70 °C).
#Slowly tur ncap 1 counter-clockwise to
re lie ve exc ess pressure.
#Continue turning cap 1counter-clockwise
and remo veit.
The coolan tleve lisc orrect:
Rifth ee ngine is cold up tomar kerb ar2
Rifth ee ngine is warm upto0.6 in (1.5 cm)
ove rmarke rb ar2
#If necessar y,topupw ithc oolant that has
been appr ovedbyM ercedes-Benz.
RFurther information on coolant (→pag e392)
Adding washer fluid tothew indshield
wa sher sy stem
&
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 swhen open‐
ing theh ood
If yo uo pen theh ood when thee ngine has
ove rheated or during afireint he engine
compartment, youc ould come int ocontact
wit hh otgases or other escaping operating
fl uids.
#Befor eopening theh ood, allo wthe
engine tocool down.
Maintenance and care 325
