It's back again.
Summer driving and no problems. Get to winter and the car for the first 5 mins is lumpy. As you pull away the car feels like it's jerking every 5 seconds or so. Give it 5 mins and the problem has gone. But more noticeable on acceleration rather than cruising.
Bmw had it last year and could not detect the problem and plugged in diagnostics. But it's fine in the summer.
BMW F30 330D M Sport 2016 in Mineral Grey.