My 2005 1.5dci Megane has a lumpy idle, not always, but quite often. If you increase revs to 1000, it disappears.
Before i start weeping that it may be DMF, I would like to check out the egr.
Can you confirm that this is the egr, top centre in the picture please.

I am due yo do an oil change, so fancy doing both at the same time.
Many thanks
Callum