I have a strange problem with my Micra n-tech. In the meantime I know that it only appears at temperatures below -3 degrees. I park my car. After a few hours/or one night I get into the car. I step clutch and brake uniquely. Immediately the vehicle rolls off and can only be stopped by a courageous intervention with the hand brake. No I pump when parking not several times with the pedal and yes I am aware that without the motor of the brake power amplifier is not functional If I start the engine it is no longer a problem, everything works perfectly. I went to the workshop after the 2nd time. However, the engine was warm, the outside temperatures in the plus area and the car passed all the brake tests without any problems during the test drive with the mechanic. At warmer temperatures I also have no problem. Through the further observations I noticed that it was just It can also happen that the brake pedal becomes hard immediately after the engine is switched off and almost pushes my foot upwards. There’s something wrong with the vacuum? But why only in cold temperatures? Does someone know that? The car is new and doesn’t have 4000km on it yet.