Deda97

Hello guys, Recently i bought a 2010 2.0 140hp A3. When with warm engine, everything seems ok. But when engine is cold and i start it, it has some weird sounds and tremors (literally causing people in the car to shake and move) when driving it and increasing speed until it get warmer, it lasts couple of minutes and the feeling is very unnatural. What could it be? There is nothing on the board and diagnostics don't show any error.