Mercedes-Benz CL-Class 2014 Owners Manual - Manual (Page 373)

Engine
Display messages Possible causes/consequences and M Solutions
+
Check Coolant
Level See Oper.
Manual
The coolant level is too low.
! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(
Y
page 424).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop.
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