how much r134 to fill system; replaced compresor

There is information in the owner's manual, and labeled under the hood (unless the hood has been replaced), and there probably is a sight-glass to watch as you charge the system. I've done a lot af A/C work and this advice comes from experience.. Those sources are more accurate than anything I could find for you. Also there are some online resources for you: For AllData: http://bit.ly/AllData_Repair_Manuals_Online Here's the one for Mitchell as well: http://bit.ly/mitchell_repair_manuals_online If you want to find a Beemer specialist to ask, here's a directory link for you: https://repairpal.com/bmw-repair-in-north-bend-washington