Can metallic bits come off the lifters? My -08 330i makes very similar noise. I took it the bmw maintenance shop for oil change, and they found some metal all
the way in the oil filter. The car feels perfectly fine to drive, no any cranking just fine, and the ticking noise goes away completely when properly revved/warmed up. My car has 160tkm on the clock.
Also ticking goes with rpms like in this video.