Good Afternoon Everyone!

I have a US model 2019 C300 4 base sedan with a code telling me to replace the coil pack/spark plug (running rough, some power loss, etc.) I have about 49k miles on the car. I know I need to replace the plugs and have bought all four of the plugs and a coil pack from Mercedes. Mercedes suggested not replacing the other packs until needed. They also didn't have 4 anyways...

What is the firing order of the engine? Gap and torque for the plugs?

Thanks everyone again!