Here is a link to a company that sells rebuilt MB engines:
The 190E 4-cylinders are M102's and are 2.3 liters.
1984's have a different engine code than 85-93's.
I have no idea how much it is to R & R and engine.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".