Adding Coolant - Mercedes-Benz 2002 M-Class Operator's Manual

Adding coolant

If coolant has to be added, a 50/50 mixture of water and
MB anticorrosion/antifreeze should be added.
After adding coolant, close cap until you hear it click a
few times.
The drain plugs for the cooling system are located on
the left and right side of the engine block directly above
the engine mounts and at the bottom of the radiator.
Anticorrosion/antifreeze mixture, see page 319.
Warning!
In order to avoid possible serious burns or injury:
• Use extreme caution when opening the hood if
there are any signs of steam or coolant leaking
from the cooling system, or if the coolant
temperature gauge indicates that the coolant is
overheated.
Engine compartment
Instruments
Operation
and controls
257
Instrument
Driving
cluster display
• Do not remove pressure cap on coolant
reservoir if engine temperature is above 194 ° F
(90 ° C). Allow engine to cool down before
removing cap. The coolant reservoir contains
hot fluid and is under pressure.
• Using a rag, slowly open cap approximately
1/2 turn to relieve excess pressure. If opened
immediately, scalding hot fluid and steam will
be blown out under pressure.
• Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which may
burn if it comes into contact with hot engine
parts.
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