I can confirm the method does work and its so relieving. The car was beginning to worry me with that lack of engagement in first gear and im happy to say the problem is gone. I will add though, the car seems to have different profiles for sport and normal mode so although the guide only talked about sport mode, it made no initial difference in normal. I had to repeat the process in normal mode and now the car is like new. It grabs as soon as the brakes are released and accelerates smoothly !