Hello I have the following problem. My tacho fails sporadicly. In the stand “twitches a few times and commutes at 0. After that it works. Or it stays stuck in a position. Or it does not go back to 0 and after a short time I drive 200, after Tacho I have already removed the sensor on the rear axle and cleaned it up. Also the plug. Without success. I hope someone has an idea.