BMW M5 Sedan Owner's Manual page 113

Make sure that the closing path is clear.
Initializing the system
Press the switch up and hold it
until the initialization is complete:
Initialization begins within 15 seconds.
▷ If the glass sunroof is closed, it opens then
closes again.
▷ If the glass sunroof is open, it first closes,
then opens and closes again.
Initialization is complete once the glass sunroof
and sun protection have opened then closed
again.
Opening and closing
Online Edition for Part no. 01405A37B39 - VI/21
CONTROLS
113