For the 5 blinks, the coding is as follow...
(Older Software Revisions)
3068 BLINKZYKLEN_ANZAHL_TIPP
Werte = # blinks-1 (ie. 4 blinks = werte=3)
(Post 4-2017) Shows 3 in iDrive menu but as long as no settings are changed will blink 5 times.
3069 PIA_DEFAULT_TIPPBLINKEN Teppblinken_fuenfmal...
I have a much easier solutions, since I have to constantly open the rear drivers door...and realized that if the seatbelt is connected the car won't shut off 8-) so buy a seatbelt extension (i happen to have a few laying around when I used the boosters for my kids and keep it in my center...