Thanks for getting back to me. Metra was about 4mm too small, my Atoto unit is slightly different than yours and may be bigger. I ordered the sun coast kit, it should show up today.
i have the Bose/MOST and bought an AVIN MOST-PC adapter but connectors are different did you need a MOST adapter? If so, which did you use?
I’m also looking to have real time diagnostic info. Are you just using an elm BT ODBII adapter?

thanks for your help.

I took a 4 hr road trip yesterday with just PCM radio and it was painful so can’t wait to get this setup working.

Hi Quaz,
I noticed you installed the ATOTO head unit (looks great) and I'm looking to do the same in my 04 996 tt. The Metra kit I bought is a bit small for the ATOTO A6 Pro and wondering which kit you used. Do you recall?

Thanks,
George