Mercedes-Benz A-Class Operator's Manual page 468

466 Display messages and warning/indicator lamps
Display messages Possible causes/consequences and
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* The hood is open.
C
* At least one door is open.
& WARNING Risk of accident if the engine hood is unlatched while driving
An unlocked engine hood may open up when the vehicle is in motion and block your view.
Never unlatch the engine hood while driving.
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Before every trip, ensure that the engine hood is latched.
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Pull over and stop the vehicle as soon as possible, paying attention to road and traffic conditions.
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Close the hood.
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Close all doors.
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