symphony
 

I have an Audi A5 with a symphony 6 disc head unit, does anyone know if I could fit OEM dab radio module or bluetooth OEM module to this head unit. I have been searching for help but cannot find anything. T.I.A

That may depend on your year/body style. The guys at enfig car stereo have some great stuff and everything I have purchased from them has been great. not to mention they have great customer service. here's their site
Enfig Car Stereo - iPod XM and Sirius Satellite Radio & Auxiliary AUX Audio input specialists | Page 1 of 1
depending on your year they may have something for you. As the A5 isn't as big in the aftermarket community, you may need to call and ask if something from an A4 or A6 would wor,. but I don't know much about installing an OEM system on a car that did not have it originally. I would imagine it is possible, depending on if the reciever is part of the head unit or not. I know satellite is a separate module in the trunk and you may be able to get the antenna and plug it into the currently redundant plug on the back of the head unit (my A4 did not come with satellite radio but the plug was still on the back and the button on the front), but BT may require an aftermarket attachment, or a new head unit.