This is my Sirius install,
I bought the bracket off eBay for $27.99 + p&p which is expensive but IMO worth it as its specifically designed for the 2003 A4 so its a perfectfit! All you have to do is remove the HU and unbolt a bolt, put the bracket in place then bolt back on and put the HU back in.
The hardest part was removing the HU as i had removed it before and the Key's got stuck and so i had to wrangle them out which messed them up a bit so when i used hem this time around they weren't as effective! I swear i was pulling so hard i thought it was going to cut my finger off! Then i had the bright idea of putting a cloth in the key hole for the pulls so it wouldn't hurt, so much!
I'm going to eventually hide the GPS antenna under the dash by removing the glove box. I did this on my MK4 Golf GTI for the Sat Nav.
DOWN side to my sirius install! I was listening to it on the way home the other day instead of having my Radar detector plugged in and surprise surprise i got pulled by a sneaky taffic cop on a motorbike for doing 68 in a 55! I handed him my UK license (i live in SC, USA now) and he looked a bit puzzled and asked me if it was valid. In the end he didn't give me a speeding ticket but a lesser ticket of Careless Driving and i have to go to court! It could have been worse, so i'm fairly happy.
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