Mercedes-Benz 2008 M-Class Operator's Manual page 434

Display symbol Display message
B
Top Up Coolant
See Operator's Manual
Warning!
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 could be seriously burned.
!
Do not ignore the low engine coolant level
warning. Extended driving with the message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz
Limited Warranty.
Do not drive without sufficient amount of coolant
in the cooling system. The engine will overheat
causing major engine damage.
Possible cause/consequence Possible solution
The coolant level is too low.
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Practical hints
What to do if ...
Add coolant ( page 345).
If you have to add coolant frequently,
have the cooling system checked by an
authorized Mercedes-Benz Light Truck
Center.
433