C Oolants - Mercedes-Benz C 230 1998 Owner's Manual

C oolants

The engine coolant is a m ixture of
w ater and anticorrosion/antifreeze,
which provides:
• corrosion protection,
• freeze protection,
• boiling protection (by increasing
the boiling point).
The cooling system w as filled at
the factory with a coolant providing
freeze protection to approx. -2 2 °F
(-3 0 °C ) and corrosion protection.
The coolant solution m ust 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 im portant corrosion
protection, the solution m ust be at
least 45% anticorrosion/antifreeze
(equals a freeze protection to
approx. -2 2 ° F J-30°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 tem perature
will increase due to the lower
150
heat transfer capability of the
solution. Therefore, do not use
more than this am ount of anti­
corrosion/antifreeze.
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
m ust m eet m inimum requirem ents,
which are usually satisfied by
normal drinking water. If you are
not sure about the w ater quality,
consult your authorized M ercedes-
Benz dealer.
Anticorrosion/antifreeze
Your vehicle contains a num ber of
alum inum parts. The use of alu­
m inum com ponents in m otor
vehicle engines necessitates that
anticorrosion/antifreeze coolant
used in such engines be specifi­
cally form ulated to protect the
alum inum parts. (Failure to use
such anticorrosion/antifreeze
coolant will result in a significantly
shortened service life.)
Therefore the follow ing product is
strongly recom m ended fo r use in
yo u r car: M ercedes-Benz A n ticor­
rosion/A ntifreeze Agent.
Before the start of the w inter
season (or once a ye ar in the hot
southern regions), you should have
the anticorrosion/antifreeze
concentration checked. The
coolant is also regularly checked
each tim e you bring yo ur vehicle to
your authorized M ercedes-Benz
dealer for service.
A nticorrosion/antifreeze quantity
Model Approx. freeze
protection
-3 5 ° F -4 9 °F
(-3 7 °C ) (-4 5°C )
C 230 5.0 US qt
(4.75 I)
C 280 5.3 US qt
(5.0 I)
5.5 US qt
(5.25 I)
5.8 US qt
(5.5 I)