I've got a 2.0tdi SLine SE (170) and recently had the cam belt and a service done (separate)
I had no issues that I noticed before or after the cam but since the service it idles lumpy at cold start. I can't think of anything that would have been done during the service that could cause this.
I have experienced a slight hesitation a couple of times before the cam and service.
The injectors have been done under the recall.
Any thing I can try before I get stung by the dealers, basics please I'm not 100 tech minded so no techie talk - simples please