Can anyone advise me on this?
I have a 2000 M5 that had a phone system in it, have the SES module still in car. If I do the 25 to 54 pin adapter should this unit be a simple plug and play (with BT antenna of course)?
Are the newer (E90, etc) modules compatible? Have seen a few listed on ebay but when I do a search on the part number on realoem or BMW parts sites I get nothing, any idea why that is?
Any reason not to mount the BT antenna in the arm rest area? For better reception...
Any difference between the CDMA and GSM units in regards to BlueTooth useage (dont care about plugging phone in, no snap-in modules for my phones).

I have tried searching, but find little about what makes the early 2000's different. I know with the ULF setup they charge an extra $100, but haven't seen WHY...
I dont use the phone often in car so I can't justify spending $500-800 on a BT setup, but $300ish for a used TCU is closer to justifiable for me (and wife unit)...
Thanks all..
Matt