I havent got a answer
Putting the same engine in that you are removing will simplify things and keeps costs down. Putting another sized engine in will require electrical harness and computer changes and might not be possible, even modification of supports and other parts, so uncharted territory. Frequent some Mercedes Benz forums and local garages and see what you come up with, maybe someone else has done something similar and can share their experience. Good luck.
NO- nice try-
Looking for a Used C-Class in your area?
CarGurus has 32,259 nationwide C-Class listings starting at $1,900.
Search Mercedes-Benz C-Class Questions
Mercedes-Benz C-Class Experts