2007 s550 Ac won't go from off to on

That is normal until the proper amount of refrigerant is added to bring pressures up to specs.

I took Radiator out and put a new one now my AC button will cut on then right off

I took my radiator out my s550 Benz 2007 but I did not disconnect AC hose I put new radiator in now when I push ac on it cut on for 2 Second then say off

What did u have to do to fix it