Checking Coolant Level - Mercedes-Benz 300 E 1990 Owner's Manual

1 Coolant reservoir cap
2 Marking for coolant level

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 must reach:
The marking (2, arrow) on the
reservoir when the engine is cold.
Approx. 1.5 cm (0.6 in) higher
when the engine is at operating
temperature.
Adding Coolant
If coolant has to be added, a
5 0 /5 0 mixture of water and MB
anticorrosion/antifreeze should be
used.
Warning!
• Use extreme caution when
opening the hood if there
are any signs of steam or
coolant leaking from the
cooling system.
• Do not remove pressure cap
on coolant reservoir if en­
gine temperature is above
90°C (194°F). Allow engine
to cool down before re­
moving cap. The coolant
reservoir contains hot fluid
and is under pressure.
• Using a rag, turn cap to first
notch to relieve excess
pressure. If opened imme­
diately, hot scalding fluid
and steam will be blown out
under pressure, possibly
causing personal injury.
• Do not spill antifreeze on
hot engine parts. Anti­
freeze contains ethylene
glycol which may burn if it
comes into contact with hot
engine parts. You can be
seriously burned.
The drain plugs for the cooling
system are located on the right-
hand side of the engine block and
at the bottom of the radiator.
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