Engine mounts replaced immediately to stop the noise in the cabin. It worked.
Header pipe replaced.
Idler arm bushing replaced, this replacement helped to make the steering much tighter.
Some rust repair.
I bought this car from a friend for 100 dollars, and therefore I wasn't expecting much. She barely maintained it, and had a new engine dropped in at 300,000 miles. She bought a brand new S Class, and gave this car to me. A bit noisy (diesel) but extremely reliable. I want to keep this car until I die. I would recommend this car to a person who wants an extremely reliable commuting car. It is economical, getting 38 miles per gallon. This is much better than compact Japanese cars, and it is sometimes triple their weight!
38 mpg is unheard of in the 240D. Unless all driving is downhill with a tailwind. 28 more likely.
But that is a quibble; it is an excellent car.