Problem with Audi A4 1.9 TDI 115 hp year 99

Hello friends, I have a failure as the entire audi a4 1.9 TDI 115 hp year 1999 falsifies, this makes it sunny in cold when the temperature is cold is failing and then it looks good, the needles go up and down, the lights of the painting go out and turn on as if there were a phase of a cable- If anyone knows something about this, please help.

The only thing you can do is check the current, or take it to an electric, but apparently it is nothing serious, I recommend checking the motor lands you want to be loose or make a bad contact, but the little sore in Peugeot the same thing happens when the battery is in poor condition, since most of the lands take them direct from battery. let us know how you are going.