Hi Guys, Need assistance please.

Just purchased a 2008 A6 le Mans 3.0 tdi quattro in my favourite colour.. RED.

having checked the car over I never realised apart from missing Sat Nav which is no issue, it has no Telephone Prep / Bluetooth? Find that astonishing on a 2008 when it's pretty standard on lot of cars even older.
Unfortunately for me I'm on the road quite a bit with work and get calls too often.
Please can someone here advise how to get Bluetooth... Ideally with music streaming but not essential on my car without breaking the bank? I've seen so e Ami kits online but not sure. Also, whilst I'm baffled it has no Bluetooth, does it have Aux, as I can't seem to find it..unless I'm blind 😎

Thanks..