Thanks for all the tips!
I will double check the valve adjustment, and yesterday I bought a diesel compression tester on Ebay. (weird that buying the tester from the US is about 1/5th of the price of a tester here) I think and hope that with new nozzles, rack damper bolt and another valve adjustment, things will smooth out. And yes, new engine mounts too. It's just that W460-specific parts tend to be rather pricey..
