Pioneer AVIC F700BT in A3

Just bought a 2011 A3 S-line

I've bought an "Audi A3, A4, TT Steering Wheel Stalk Control Interface Adaptor Lead" and just wanted to check what level of functionality I should have with it? I've connected the Fakra block, interface block and my existing Pioneer patch lead, but haven't connected in any of the loose bullet connectors - what are they for?

The car has a multi function steering wheel and built-in bluetooth. I've removed the factory fitted Concert III head unit and replaced it with a Pioneer F700BT satnav. I want to use the Audi Bluetooth and phone integration, with the pioneer only handling music and navigation. I've turned off bluetooth on the Pioneer.

Head unit audio - OK
MFSW vol up/down - OK
MFSW track selection - OK
Phone synchs to built-in Audi bluetooth - OK
Select phone book entry using MFSW and dial - OK

Mode/source button on MFSW alternates between head unit & phone book, but doesn't select between different sources (e.g. CD, FM...) - should this be possible?

Phone / bluetooth audio isn't being diverted to the speakers - I guess this is being routed via the Pioneer head unit - does this require different cabling?

I didn't test whether the built-in mic works with the Audi Bluetooth, because I didn't have any audio output - should this work, or will I need a separate mic connected to the Pioneer?

Will the built-in voice dialing still work once I get bluetooth/phone audio & mic sorted?

I'm assuming that the Audi Bluetooth is a fully stand-alone setup that doesn't depend on the Concert head unit - is that right?

Sorry for so many questions - I suspect the answers will all be related.

TIA

OK, a bit more digging and a bit more confusion.

With the Pioneer connected, I have no sound to the rear speakers - tracing the connections, it seems the Quadlock doesn't have any rear speaker pins on the loom side - and I might have Bose...

On the Brown Quadlock module, only pins 2, 3, 6 and 7 are present (front speakers, + and -).
On the blue module, pins 1, 3 and 7 are connected - pin 7 appears to be the Bose pin??
On the green module, 5 & 11 (RL/RR line out), 6 & 12 (TEL NF IN) and pin 8 (line out gnd) are connected

Does this mean I have bose amplifying only the rear speakers?

How would I take RL and RR speakers from my head unit into the loom?

TEL NF IN (telephone module audio in): is that "into the head unit" or "into the loom"?

I'd be happy if I could just get all the speakers to work.