So the TPI 2066316/1 for updating the 16xx software to 1896 is out in the UK and Ireland.
3 other TPI's point to this 2066316/1 as the solution:
2065214/2 - We Connect: message for emergency call system/online services not available/event entry U178500 (MOD3.2)
2063712/5 - Driver assistance systems, rear view camera: picture sometimes too dark/shown with delay
2066464/1 - We Connect: "Become main user" not possible/fails (SW16xx, SW1810) [MOD3.2]
There are other TPI's too but in German for now like Keyless Problems(2060781/4), side-assist or parking sensors not working(2064061/4) and various errors and problems with 16XX (2065241/3).