Not an expert but I have recently needed to replace my turbo actuator.
Different symptoms to you though - just lacking power. Incidentally, Jeep Aus will only sell the turbo for our MB OM246 CRD complete, for $9,660 - but one can be purchased separately on eBay. Even a new turbo complete is $500-1,000 there.
Have you recently changed your fuel filter?
Have you checked your air filter?
This motor has two fuel pumps
You may need to check fuel pressure at the rail.
https://forums.mercedesclub.org.uk/i...el-pump.93066/
Your issue seems to be fuel flow - an air restriction, or perhaps an air leak between air filter and turbo.
A while back I needed to replace the two rubber orange coloured seals - one at the turbo inlet, and the other at the EGR.
Jeep Aus cannot supply them - but eBay can.
The inlet air system must be airtight otherwise sensors will give false readings.
Otherwise look to fuel pressure at the rail.
Just a fw suggestions. Good luck.