Checking Coolant Level; Adding Coolant - Mercedes-Benz 300 D 1984 Owner's Manual

C hecking Fuels C oolants

Checking Coolant Level

The coolant level can be checked
visually at the transparent coolant
reservoir.
To check the coolant level, the vehicle
m ust be parked on level ground.
The coolant level m ust reach:
The marking (1, arrow) on the
reservoir when the engine is cold.
Approx. 2 cm /0.8 in higher when the
engine is at operating tem perature.
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L u b rica n ts etc.

Adding Coolant

If a small amount 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 mixture of water
and anti-corrosion/antifreeze should
be used.
Warning:
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 water 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 out under
pressure.
The drain plugs fo r the cooling
system are located on the right-hand
side of the engine block and the
b ottom of the radiator.