Coolant
Important safety notes
GWARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
!Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be found
in the Mercedes-Benz Specifications for Ser-
vice Products, MB BeVo 310.1, e.g. on the
Internet at http://bevo.mercedes-benz.com.
Or contact a qualified specialist workshop.
!Always use a suitable coolant mixture, even
in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
iHave the coolant regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Comply with the important safety precautions
for service products when handling coolant
(
Ypage 289).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the fol-
lowin g t
asks:
Rcorrosion protection
Rantifreeze protection
Rraising the boiling point
If the coolant has antifreeze protection down to -35 ‡(-37 †), the boiling point of the coolant in
the pressurized system is approximately 266 ‡ (130 †). The antifreeze/corrosion inhibitor concentra-
tion in the engine cooling system should:
Rbe at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †).
Rnot exceed 55% (antifreeze protection down
to -49
‡[-45 †]) .Otherwise ,hea twill no tbe
dissipated as effectively.
Mercedes-Ben zrecommends an antifreeze/
corrosion inhibitor in accordance wit hMB Spec -
ification sfo rServic eProducts 310.1.
iWhe nth evehicle is first delivered, it is filled
wit h a coolan tmixture that ensures adequat e
antifreez ean dcorrosion protection .
iThe coolantis checke dwit hever ymainte-
nanc einterval at aqualifie dspecialis twork-
shop.
The engin ecoolin gsyste mis filled wit hcoolan t
at th efactory whic hcontain santifreeze/corro-
sio ninhibitor that ensures protection down to
approximately -35 ‡(-37 †) .
Yo ur vehicle has a ran ge of alum
inum compo-
nents. Aluminum components in the engine
make itnecessary to use antifreeze/corrosion
inh ibit or that has been specific allyformulated to
protect the aluminum parts. Failure to use such
anticorrosion/antifreeze coolant willresult in a
significantly shortened service life.
The coolant must beused throughout the year in
order to maintain the necessary corrosion pro-
tection and to provide protection from over-
heating. Inthe Maintenance Booklet, you can
find information on the intervals for renewal.
The renewal interval is determined bythe cool-
ant type and the engine co oling system design.
The renewal interval in the Maintenance Booklet
is only valid if the coolant is renewed or added to
wit h Mercedes-Benz approved products. There-
fore, only use MB 326.0 antifreeze/corrosion
inh ibit or or another Mercedes-Benz approved
product of the same specification.
In formation on other products with the same
specifications that are approved byMercedes-
Benz can beobtained at an authorized
Mercedes-Benz Center or on the Internet at
ht tp://bevo.mercedes-benz.com .
If the coolant level is too low, MB 325.0 anti-
freeze/corrosion inh ibitor should beadded.
Have the engine co oling system c
hecked for
possible leaks.
294Service products and filling capacities
Technical data
