At the risk of offending IS 220d owners they dropped it cos it wasn't very good!
My brother in law has one. It's a decent enough car really but he wishes he bought a 250 sometimes! Head gaskets blow on these all the time and he says he's just waiting for his to go. He says it's inevitable however well he looks after the car! Just look at all the threads on here about IS 220d problems! DPF filters, carbon build up, noises, shakes, rattles, the lists goes on!