W211 black death query

[S-class]

Hi All

I've read a few threads concerning the "black death" on certain engines, I've got a 2008 W211 E220, I've popped the engine cover and all looks ok to me but just wanted to confirm i'm looking at the right area, are the 2 pictures below the right area to look at?

 

[mersum1es]

injectors are under that foam part in lower picture, follow metal fuel lines from rail tube... check that there is no black/moist in foot of the injector and no gas leak heard or felt.

 

[S-class]

Ah yes in first photo I lifted that, didn't see any black soot.