Audi S5 Owner's Manual page 196

document_0900452a81793dcc.book Seite 194 Mittwoch, 21. März 2007 5:42 17
194 Intelligent technology
battery has been charged up again sufficiently while the vehicle was
being driven.
Message comes on and does not go out
If the message appears in the display after the ignition is switched
on or while driving, and does not go out again, the battery is not
being maintained at the proper power level. Starting reliability may
be impaired. You should have the battery checked by a qualified
workshop as soon as possible.