Mercedes-Benz 380 SEL 126 1981, Owner'S Manual

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Checking Fuels Coolants Lubricants etc.
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 (1, arrow) on the reser­
voir when the engine is cold.
Approx. 2 cm/0.8 in higher when the
engine is at operating temperature.
Replenishing Coolant
If a small amount of coolant has to
be added (due to evaporation of
water), plain water can be added.
If a larger quantity of coolant has to
be added, a 50/50 mixture of water
and antifreeze should be used.
Caution:
Do not remove pressure cap on
coolant reservoir if engine tempera­
ture is above 90° C/194° F. Allow
engine to cool down before remo­
ving cap. The coolant reservoir
contains hot water and is under
pressure.
First turn cap to first notch to relieve
excess pressure using a rag. If
opened immediately, hot scalding
fluid and steam will be blown out
under pressure.
The drain plugs are situated on the
right and left side of the engine and
on the radiator bottom.