So just finished installing the front parking sensors (already have factory fitted rear sensors), and once engaged I get parking system fault in the dash. So VCDS says internal system fault in all four sensors and an open circuit fault in the parking button. I have not installed the new button panel with the additional parking button yet (still trying to source it) hence the permanent open circuit error in VCDS. When reverse is engaged the front parking sensors activate and seem to work for the first few seconds, with all the OPS lines showing and VCDS measuring blocks indicating that all the front parking sensors are recording real distances so all seems to work but a few seconds later the front system turns off (with parking system fault) with the rear system still working. Could the missing parking button (and hence the open circuit error) be enough to cause the system to turn off with a dash error? Any way I could rewire the back of the button panel so the start/stop button could act as the front parking button just to test this theory?