I made sure to keep the brake res. full. There is only one filler cap, I would imagine they would both fill from there?

My first time flushing my brake system on my MB. I have done it on other vehicles in the past, I thought it would be straightforward.

BTW, I have NO brakes now, My pedal easily goes to the floor, I can barely keep it from moving in D. With the car off, the pedal has more resistance, but can still make its way to the floor