My 2011 E200 CDI overheated. Changed head gaskets. Now car wont start.

 

I mean after the head gasket replacement, engine cranks but wont start. There are no trouble codes registered in the ECM. The engine timing marks are perfectly aligned. I have 270 bar pressure on the rail while cranking. I did not register any voltage on the piezo injector harness while cranking. Question 1, do i need to check lanchester shaft alignment marks when doing cylinder head gasket replacement? question 2, How much voltage is sent to the piezo injector while cranking?

 

Sorry. Three out of four injectors miraculously died after the overheating episode. Still wondering how though. Will order for new ones. Thanks for the help.