Need a clear bleeding procedure. I have a 96 525i and I do not know how to bleed it.

Do I start the car? Is the rad cap on or off? Is the little pressure relif valve open or closed? Do I let it run until there is no air but fluid coming from the pressure valve? Do I squeeze the hoses? If so when, when the car is running?

Would air in the system cause my temp guage to act funny? My heater not to work?

Thanks.