2006 3.0d with 240,000k's - Things to look for?

[Salty_Dog]

Our 2006 3.0d is humming along nicely, just took her on a 2500k road trip and everything was sweet.

But, i am starting to get paranoid.
Whilst reading about other 4WD vehicles (Toyota Prado, Nissan Patrol, VW Amarok), you hear all these horror stories regarding common rail diesels, injector issues, injector seal issues and engine failures.

So, what is the story with our E53 3.0d engines?

As mentioned, ours has just clocked over 240,000
It starts perfectly, no smoke
Idles smooth (no rattles, but it is hard to tell, as it does make the distinctive diesel rattle)
Gets 1050k's from a tank
It does purge some black smoke under hard acceleration (the first time you do it)

I know i need to replace the Auto Trans fluid
I do the Engine Oil and Filters every year or 10,000k's

But is there anything engine related that needs attention?
Timing Chain? Tensioner? Injectors?
Should you run an injector cleaner through them? And do they even do anything?

Or should i just leave it alone?