Car: 1991 560 SEL
Project: replacement of Fuel accumulator, fuel filter, fuel pump check valves, and some fuel lines.

I know I will need to drive the car to have minimum gas in the tank. I know about open gas tank cap and put it back on to release fuel pressure. I know I will have a small rubber stopper to plug the fuel line from the tank.

What I don't know if how do I prevent the gas in the line between filter and injector coming out. What is the bleeding process (keep cranking?). Is it o.k. to buy SAE high pressure fuel line rather than metric ones. Autozone sells those SAE for $8 a feet.

Any other "don't do this" or "do this" tip you all can kindly provide?