The voltage regulator blew out all electrical on 93 Mercedes 190e Got important things fixed but hard to start now especially when its cold What could the problem be?

This is probably a separate issue. Most 190e's with the 2.6l engine are known to be rather troublesome in cold, and wet weather. As I live in Maine, we get a lot of that... The most common solution is to replace the cold start sensor. This will keep you from having to give your car a shot of starting fluid every time you want to go somewhere.