It can be done, but the question is: Is it worth the money, effort, time, and the inevitable decrease in durability/reliability.
Mercedes engines that have turbos were DESIGNED to be turbo engines, so putting one on an engine that was NOT designed for it WILL shorten its lifespan. Particularly the diesels. MB's turbo engines have different pistons, rods, injection timing, valve timing, exhaust systems, tranny gear ratios, etc.....and they are engineered to achieve maximum output and efficiency without compromising durability, economy, and reliability.
The money you would spend adding a turbo and all the neccessary modifications to your car (and it would be very expensive to do it properly!) would be better spent buying another car that already has one.
Mike