Cooling Water; Antifreeze - Mercedes-Benz 209 D Operating Instructions Manual

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3.3 Coolants
Cooling water
In the factory the coo ling water is blonclccl
with antifreeze (protect ion down to
-20 Cl
-4"F) throughout the year Anllfroow
reduces the formation of scale and co rro
sion.
If antifreeze is not required, 1 % (10 cm 1 /
liter) of recommended corrosion inh1l>1to1
Antifreeze
Winter operation without antifreeze 1s very
dangerous and therefore prohibited If tho
antifreeze has been in the cooling system
all year, check for sufficient protection .
The antifreeze solution must be draino<I
from the system and renewed after a mnxi
mum period of two years.
The cooling system may need degreasing,
descaling and flushing prior to the use of
antifreeze.
Do not add any more than 60
lo
of anti-
must l>o used to treat the coo ling water
(potatile water quality).
lnlornmt1on regard ing recommended cor-
,o~.lon 1nh1b1tors and antifreezes may be
ol>t.1111£'< 1 from any MERCEDES-BENZ
Sf'IVICO
stnllon
lwe,u .is till' antifreeze protection effect
clpcrenses at a higher percentage .
Tho
efficiency of the antifreeze solution
should be checked several times during
tho co ld season.
Mixing ratio
Protection to Water
Antifreeze
OF
(DC) %
%
- 4
(-20) 66
34
-22 (-30)
56
44
-40
(-40) 49
51