AGR values OK?

Hello,

My V6 TDI engine: BDG, 141,000 km, sometimes experiences fluctuating power output. It seems to me that he is always accelerating differently.

I removed my suction tube last week, and it's completely dirty.
Several mm of OIL/SOOT, like TAR.

The suction nozzles are also dirty, the one from cylinder 4, 5, and 6 is dirtier than the ones from 1, 2, and 3.
How is this possible?

Now I drove a log today. I have logged MWB 3, 8, and 11.

Can you tell if something is wrong or is everything okay?

I accelerated three times, climbing the hill in third and 4th gear, reaching approximately 4000 upm.

Best regards, Steffen