Mercedes-Benz 280 CE 1979, Owner'S Manual

Page: 78 / 83

Fuels Coolants Lubricants etc. Capacities
Coolants
The coolant is a mixture of water
and antifreeze. In production, the
cooling system is filled with an
antifreeze-water mixture offering
protection to approx. -2 2 ° F
(—30° C). The red mark on the
temperature gauge in the instru­
ment cluster is matched to this
antifreeze-water mixture (approx.
boiling point 257° F/1250 C). The
protection against corrosion is also
ensured by this mixture making it
unnecessary to add a corrosion
inhibitor.
The coolant remains in the cooling
system all year round and must be
renewed after 2 years at the latest.
This applies also to trailer opera­
tion, hard driving and to vehicles
driven in tropical countries.
If coolant has leaked from the
cooling system, replace the missing
quantity with water and a recom­
mended brand of antifreeze. For
normal replenishment (due to
evaporation of water) plain water
will do.
The water should be clean, soft to
medium soft and contain the mini­
mum amount of scale forming
minerals (potable water quality).
The coolant mixture should always
contain enough antifreeze to ensure
protection to a minimum of - 4 ° F
(-2 0 ° C).
If antifreeze is not available, add a
corrosion inhibitor to the cooling
water to ensure proper protection
against corrosion. To treat the
cooling water, do not use more
than 1 % (10 cc cm/l) of a recom­
mended corrosion inhibitor.
Without antifreeze in the cooling
system, the water already starts
boiling at approx. 224° F (118° C),
which means that the pointer of the
temperature gauge in the instru­
ment cluster may still be below the
red mark.
Antifreeze
Prior to the onset of the cold
season, check the coolant for its
resistance to cold. Repeat this
check during the cold spell. Regular
testing of the antifreeze concen­
tration is carried out only at each
MERCEDES-BENZ maintenance
service.
To prevent damage to the cooling
system, fill only with recommended
brands of antifreeze.
Any MERCEDES-BENZ service
station will readily advise you on
recommended antifreeze brands.
Protects Antifreeze
up to US/Imp. qts. (I)
- 4° F 3.7/3.1
(-2 0 ° C) (3.50 I)
-2 2 ° F
4.7/3.9
(-3 0 ° C) (4.50 I)
-4 0 ° F
5.5/4.6
(-4 0 ° C) (5.25 I)