Mercedes-Benz E 320 1994, Owner'S Manual

Page: 126 / 141

Coolants
The engine coolant is a mixture of
water and MB anticorrosion/anti­
freeze, which provides:
• corrosion protection
• freeze protection
• boiling protection (by increasing
the boiling point)
The cooling system was filled at
the factory with a coolant provid­
ing freeze protection to approx.
- 2 2 ° F (-3 0 ° C) and corrosion
protection.
The coolant solution must be used
year round to provide the neces­
sary corrosion protection and in­
crease 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 45% anticorrosion/antifreeze
(equals a freeze protection to
approx. - 2 2 ° F [-3 0 ° C]). If you use
a solution that is more than 55%
anticorrosion/antifreeze (freeze
protection to approx. -4 9 ° F
[-4 5 °C]), the engine temperature
will increase due to the lower heat
transfer capability of the solution.
Therefore, do not use more than
this amount of anticorrosion/anti­
freeze.
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 drinking water. If you are
not sure about the water quality,
consult your authorized Mercedes-
Benz dealer.
Anticorrosion/antifreeze
Your vehicle contains a number of
aluminum parts. The use of
aluminum components in motor
vehicle engines necessitates that
anticorrosion/antifreeze coolant
used in such engines be specifi­
cally 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: Mercedes-Benz Anti­
corrosion/Antifreeze Agent.
Before the start of the winter
season (or once a year in the hot
southern regions), you should
have the anticorrosion/antifreeze
concentration checked. The cool­
ant is also regularly checked each
time you bring your vehicle to your
authorized Mercedes-Benz dealer
for maintenance service.
Approx. freeze Anticorrosion/
protection antifreeze
- 3 5 ° F 5.0 US qt (4.75 I)
(-37 °C)
- 4 9 ° F 5.5 US qt (5.25 I)
(-45° C)
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