The engine coolant is a mixture of
water and MB anticorrosion/antifreeze,
which provides:
• corrosion protection
• freeze protection
• boiling protection (by increasing
the boiling point).
The cooling system was filled at the
factory with a coolant providing
corrosion protection and freeze
protection to approx. -3 0 °C (-22°F).
The coolant solution must be used
year round to provide the necessary
corrosion protection and increase in
the boil-over protection. You should
have it replaced every 3 years.
To provide the important corrosion
protection, the solution must be at
least 40 % anticorrosion/antifreeze
(equals a freeze protection to approx.
-2 5 °C [-13°F]). If you use a solution
that is more than 55 % anticorro
sion/antifreeze (freeze protection to
approx. -4 5 °C [-49°F ]), the engine
tem perature will increase due to the
Coolants
lower heat transfer capability of the
solution. Therefore, do not use more
than this am ount of anticorrosion/anti
freeze.
If the coolant level is low, w ater and
MB anticorrosion/antifreeze should be
used to bring it up to the proper level
(have cooling system checked for
signs of leakage).
The w ater in the cooling system must
meet minimum requirements, which
are usually satisfied by normal drink
ing water. If you are not sure about the
w ater quality, consult your authorized
M ERCEDES-BENZ dealer.
Anticorrosion/antifreeze
Your vehicle contains a number of alu
minum parts. The use of aluminum
components in motor vehicle engines
necessitates that anticorrosion/anti
freeze coolant used in such engines
by specifically formulated to protect
the aluminum parts. (Failure to use
such anticorrosion/antifreeze coolant
will result in a significantly shortened
service life.)
Therefore the following product is
strongly recommended for use in your
car: M ERCEDES-BENZ Anticorrosion/
Antifreeze Agent.
Before the start of the winter season
(or once a year in the hot southern re
gions), you should have the anticorro
sion/antifreeze concentration checked.
The coolant is also regularly checked
each time you bring your vehicle to
your authorized MERCEDES-BENZ
dealer for maintenance service.
Approx. freeze
Anticorrosion/
protection
antifreeze
4.75 I (5.0 US qt)
5.25 I (5.5 US qt)
-3 7 °C
(-35°F)
^ t 5 ° C
(-49°F)
108
Содержание 300D 2.5 1990
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