Opel MERIVA Owner's Manual page 91

Depending on the equipment the
position of the control indicators may
vary.
When the ignition is switched on,
most control indicators will illuminate
briefly as a functionality test.
The control indicator colours mean:
red = danger, important
reminder
yellow = warning, information, fault
green = confirmation of activation
blue = confirmation of activation
white = confirmation of activation
Instruments and controls 89