BMW 325 Radiator Cap

So, I Purchased This Car Used In August Of 2009. I Checked Carfax. The Car Was Regularly Maintained And Had Clean Records. A Few Days Ago I...

I Can't Seem To Find A Pressure Cap On My Radiator But I Do Have A Refill Cap On My Plastic Expansion Tank. Is This The Same Pressure Cap...

I Have A Radiator Without A Radiator Cap Reservoir, And I Am Stumped On How To Fill It With Coolant After Flushing The System And Replacing...