I've got the standard business CD setup with MFSW but no bluetooth. The car is a weekend drive only and I'd like to keep the OEM head unit.
So given this, I've considered Grom and Parrott for adding bluetooth functionality. But as I wouldn't be using bluetooth to stream much music and the telephony requirement is also minimal, I don't really want to spend that much money.
I wouldn't mind adding an aux socket, but don't want to replace the head unit to get all the functionality I want (and more) as I want to keep it simple to use when driving
Suggestions anyone?
I tend to keep away from Chinese ebay specials, but has anyone any experience/comments on either of these?
https://www.ebay.co.uk/itm/Bluetooth-Music-Handsfree-CD-Changer-Adapter-BMW-5-Series-X3-X5-Z4-Business-CD/222858255211
https://www.ebay.co.uk/itm/Bluetooth-Module-Audio-Aux-cable-Adapter-For-BMW-Z4-E85-E86-CD-E83-X3/302754199721
So given this, I've considered Grom and Parrott for adding bluetooth functionality. But as I wouldn't be using bluetooth to stream much music and the telephony requirement is also minimal, I don't really want to spend that much money.
I wouldn't mind adding an aux socket, but don't want to replace the head unit to get all the functionality I want (and more) as I want to keep it simple to use when driving

I tend to keep away from Chinese ebay specials, but has anyone any experience/comments on either of these?
https://www.ebay.co.uk/itm/Bluetooth-Music-Handsfree-CD-Changer-Adapter-BMW-5-Series-X3-X5-Z4-Business-CD/222858255211
https://www.ebay.co.uk/itm/Bluetooth-Module-Audio-Aux-cable-Adapter-For-BMW-Z4-E85-E86-CD-E83-X3/302754199721