I can help you with the wheel style.
It's a BMW Style 121 from an E63 ... 8.5x19 ET 14 (Front) 9x19 ET 18 (Rear).
However, you should also know there was an Ellipsoid 121-Style Wheel Class Action lawsuit in 2011 due to the wheels being defective.
http://media.photobucket.com/image/e39 with 6 series rims/alangregson/2999.jpg
and what has to be done to make it fit e39. the center bore is 72. something can someone explain what is done when you have someone bore out your rims to 74.1 and how much this could cost?
Besides the hub centerbore issue, it`s likely that the offset is incorrect for an E39 fitment as well.
Boring out hub centers is not advisable, stress cracks can arise from this, causing catastrophic wheel failure.
You would be better off purchasing wheels with the proper specs for your car.