Crank no start

Hi and thanks for using 2CarPros.com These cars are very touchy and can easily be damaged. A few years back, I had an issue with a customer's C230 which was basically the same as your issue. After a lot of checking, I found that when the new battery was installed, the crank position sensor (CPS) was damaged. Here is what I suggest. First, determine if there is spark to the engine.

Here are directions for checking spark:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Here are directions for a no start situation:

https://www.2carpros.com/articles/car-cranks-but-wont-start

I also attached two pictures of the crankshaft position sensor location.

Let me know what you find. I hope this helps.

Take care,
Joe