Hi guys. Just had my Flat bottom steering wheel installed. MASSIVE thanks to Ash at Audi Retrofits for the service. Multi function buttons do not work however even though the horn workd and the lights come on. Any ideas why? The wheel is off an A3 8V so its a single stage airbag like the B6's. The actual buttons are off the A5 2012 Steering wheel so its the correct 'LIN' protocol. We are stumped at why we can at least operate the volume as its been said the horn and multi-function are on the same wire?! Please Help Dan.