I have a 2018 MY Sportbrake with many options including LKA but not TSR. I connected to the car with Pathfinder and Diagnostic Associates DOIP interface without problems.
After changing the CCF ( Changed EUCD098 LaneDepartureWarning to 0x33) and writing it back to the car and updating the IPMA module, I now have a TSR menu, which I can activate
and a speed sign appears on the dash and HUD, the strange thing is the sign is in MPH whereas the car is KPH ( this is with the car in my garage).

When I drive the car on the road, as soon as the navigation system detects the car is on a road, the speed sign disappears and the menu is greyed out, after turning the car off back
in my driveway and restarting the menu and speed sign are back but disappear when I drive on the road.

Anyone got any idea what I am missing? I have tried several times but can't see what I have missed.