Oil seeping/leaking?

[Coldcomfort]

Hi all,

2012 CRD 250K. I have been noticing a slight leak on/around the rocker cover near the two rear cylinders. Pic attached. It doesn't show up real well in the picture but its the best I could do.

It never gets to the point of dripping although there is a slight bit of pooling near the injectors.

Any idea's Guys/Girls?

Cheers. Brian.Image.jpeg