eddieblaze

I recently purchased my first Benz from auction so I don’t know a lot about the car. I know it had a yellow speed coil over conversion and I am in the process of swapping the power steering pump. My key fob will lock and unlock the trunk make the
lights flash and operate the alarm. It will not lock or unlock the doors. I checked the fuses under the rear seat and replaced them just in case still nothing. I also cannot lock and unlock from dash buttons either. What are my next steps please help me trace
this down.