After disconnecting the battery, parking assist dynamic gridlines not showing. Only information on the screen: "System Initialising" The system required a car steering to the left and right but it did not work. I tried many times.
Solution:
How to enable Service Menu (NX)?
Menu / Screen / Turn off the screen.
Then press on the radio: 5x track forward, 5x track back.
(RX buttons: <CH, TRACK>)
Steering wheel angle calibration:
Service menu / Function Check-Settings / Camera Settings / Steering Angle Setting / Steering Center Memorize and Max Steering Angle Memorize.