Mercedes-Benz 1984 300SD, Owner'S Manual

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Checking Fuels Coolants Lubricants etc.
Adding Coolant
If a small am ount of coolant has to be
added (due to evaporation of water),
plain w ater can be used.
If a larger quantity of coolant has to
be added, a 50/50 m ixture of w ater
and a nti-corrosion/antifreeze should
be used.
W arning:
Do not remove pressure cap on
coolant reservoir if engine tem pera­
ture is above 90° C /194° F. Allow
engine to cool down before removing
cap. The coolant reservoir contains
hot w ater and is under pressure.
Using a rag, turn cap to first notch to
relieve excess pressure. If opened
immediately, hot scalding fluid and
steam will be blown o u t under
pressure.
The drain plugs fo r the cooling
system are located on the right-hand
side of the engine block and the
bottom of the radiator.
Checking Coolant Level
The coolant level can be checked
visually at the transparent coolant
reservoir.
To check the coolant level, the vehicle
must be parked on level ground.
The coolant level m ust reach:
The marking (1, arrow) on the reser­
voir when the engine is cold.
Approx. 2 cm /0.8 in higher when the
engine is at operating tem perature.
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