Two weeks later car is at BMW

So after 2 weeks of ownership, my E90 335i is in at BMW for a couple of niggles:

1. Car idle is very rough when starting from cold
2. There is a clunk when starting from cold - sounds like it comes from gearbox. This is intermittent and sometimes happens when car has been off for as little as 10 minutes.
3. When coming to a stop there is a hard downshift from 2nd to 1st
4. Slight misfire when idling normally.
5. Sounds like pulley or belt making a noise
   

Car is being kept overnight to check the cold start issues. Going to pick up a loaner but hope it is something decent as I am going to miss the power