Question about N-CVT transmissions

Hello together, have the following symptoms with the Micra K11, Built 96 1.0 with the N-CVT transmission. The transmission works really well, but if you want to switch from D to R or vice versa it only works with force. If you wait for something in N position then it usually works easily. As if the coupling does not separate properly, when switching from D to R e.g. you notice that he wants to backwards. I put the plug off from the coal holder then goes butter-soft to switch in all directions. After that I have the coal I didn’t dare to blow the inside where the coals run out (you can do that or should do that ). I have the fear that the carbon brushes will not become completely electricityless and therefore the coupling will not separate, which would explain why it is going well if it is plugged off. Maybe the micro switch does not separate correctly (but I have no idea where the seat is located ). l is new, car has run 68,000 and no errors are displayed. Problem is from the beginning ( about 1.5 years ) since we have the car. If someone has any tips about this problem ( maybe I can measure something on the plug ) or regarding the cleaning of the grinding rings or where the switch is located. I know that this transmission is very fragile so please no instructions about it 😉 I did a lot of research but not found much about it. Thanks in advance Lg Fredi