Hi, I have an 06 Audi A3 T FSI s line special edition with a single din concert stereo system. I have purchased a Pioneer MVH-8300BT to replace the unit. However, after trailing through the forum and other websites I cannot find which adapter I need to install the HU. I suspect I may need more than one adapter, one for the ISO fitting and another for the aerial. Any advice on which adapters I need is appreciated. Current OEM setup: New HU: Thanks.