Juddering clutch.

[gtidriver]

A few weeks ago I had my clutch and dmf replaced at bmw under warranty, all was good for a few days then the juddering came back. It went in for a software upgrade and a few adjustments. All was good, but now it's back, pulling away up hill is difficult as I have to ride the clutch slightly to stop it jerking, I'm going back to bmw this week, what are they likely to do now? It's a 320d e91.