Mercedes-Benz 126 1986, Owner'S Manual

Page: 103 / 117

The engine coolant is a mixture of
water and 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 freeze
protection to -30° C (-22° F) and
corrosion protection. The red area of
the temperature gauge is matched to
the heating properties of this coolant
solution.
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 33% anticorrosion/antifreeze
(equals a freeze protection to -20° C
[-4° F]). If you use a solution that is
more than 55% anticorrosion/anti­
freeze (freeze protection to -45° C
[-49° F]), the engine temperature will
Coolants
increase due to the lower heat trans­
fer capability of the solution. There­
fore, do not use more than this
amount of anticorrosion/antifreeze.
If the coolant level is low, water and
MB anticorrosion/antifreeze should be
used to bring it up to the proper level
(have cooling system checked for
signs of leakage).
The water in the cooling system must
meet minimum requirements, which
are usually satisfied by normal drink­
ing water. If you are not sure about
the water quality, consult your au­
thorized MERCEDES-BENZ dealer.
Anticorrosion/antifreeze
Your vehicle contains a number of
aluminium parts. The use of alumi­
nium components in motor vehicle
engines necessitates that anticorro­
sion/antifreeze/coolant used in such
engines be specifically formulated to
protect the aluminium 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: MERCEDES-BENZ Anticorrosion/
Antifreeze Agent.
Before the start of the winter season
(or once a year in the hot southern
regions), you should have the anti­
corrosion/antifreeze concentration
checked. The coolant is also regularly
checked each time you bring your
vehicle to your authorized
MERCEDES-BENZ dealer for main­
tenance service.
Freeze
protection
Anticorrosion/
antifreeze
-30°
-
22
°
c4
-45° C \
(-49° F) /
5.75 I (6.1 US qt)
6.75 I (7.1 US qt)
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