New A6 2011 60 plate what head

[a6allroader]

Hi all
I've just purchased a 2011 A6 2.0 tdi Special Edition.
I know it has the CAHA engine but have read lots about issues with the cylinder head. I've tried to spot the head reference number but couldn't see it. Can anyone help please in terms of weather this year/engine wouldn't have problematic head?

Thanks folks

 

[a6allroader]

Apologies wrong section. I'll repost