What's wrong with Audi Q7epc lamp?

Audi Q7epc lights on to show various functions or functional failures.

When some indicator lights appear, the Driving Guide may be displayed. A warning will be issued at the same time. The indicator light and Driver's Guide in the instrument cluster display may be replaced by other displays. To bring up these displays, use the multifunction steering wheel to select the second tab. If there are multiple functional failures, you can use the scroll left button to bring up the display in turn.

Some indicators on the display will have multiple colors.

This answer applies to the second generation models.