Checking Coolant Level; Adding Coolant - Mercedes-Benz 300 SE 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 reser­
voir when the engine is cold.
Approx. 2 cm (0.8 in) higher when the
engine is at operating temperature.

Adding Coolant

If coolant has to be added, a 50/50
mixture of water and MB anticorro­
sion/antifreeze should be used.
W arning!
• 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 engine
tem perature is above 90°C
(194°F). Allow engine to cool
down before removing cap.
The coolant reservoir con­
tains hot fluid and is under
pressure.
Using a rag, turn cap to first
notch to relieve excess
pressure. If opened immedia­
tely, hot scalding fluid and
steam will be blown out under
pressure, possibly causing
personal injury.
Do not spill antifreeze on hot
engine parts. Antifreeze
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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