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Diesel engine coolant
9.5 Diesel engine coolant
Corrosion protection/antifreeze coolant
Sort Designation Standard/specification
ROPA item no.
Container size
Diesel engine coolant
Corrosion protec-
tion/antifreeze coolant
MB-approval 325.5 435007210 = 20 l
The coolant is a concentrate in accordance with MB approval 325.5 (Mercedes-Benz
Specifications for Operating Fluids). This concentrate is red. It must be diluted with
water before use in the diesel engine cooling system. Mix water and concentrate out-
side the coolant circuit and only then pour the ready mixture into the cooling system.
Mixing ratio
Frost resistance up to
Concentrate Water
-37 °C 50 % 50 %
This mixing ratio is important for:
•
freezing point
•
boiling point
•
heat dissipation
•
share of corrosion protection
Do not use more than 55 vol.% concentrate even at extremely low atmospheric tem-
perature. With 55 vol.% concentrate, you have the maximum frost protection of an
aqueous ethylene glycol solution, approx. for -45 °C; a higher concentrate share
reduces the frost protection and heat dissipation of the coolant, which can lead to
permanent damage. If there is less than 45 vol.% or more than 55 vol.% of corro-
sion/antifreeze agent in the coolant, the mixing ratio must be corrected immediately.
Alternatively, you can use a pre-mixed corrosion/antifreeze agent according to
MB approval 326.5.
ATTENTION
Hazard of engine damages
In accordance with MB approval 325.5, the coolant must not be mixed with other
coolants (except with a pre-mixed corrosion/antifreeze agent in accordance with MB
approval 326.5).
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