Car wont turn on

What is your question?

So i got 2011 e350 4matic benz, i had some problems with coolant and i think someone before put wrong coolant but it was leaking out, so i was driving car overheated and shut off wont turn back on, i change coolant tank it was leaking and radiator, also swap gaskets the car still wont crank what should i do?

How long has your 2011 Mercedes-Benz E350 had this problem?

More than a month