Saablin will be connected as cd changer, so original Head unit will be used. You wil just switch on Head unit to cd changer. And saablin will be started. Please check docu section on my pages or videos. rass.Very interesting!
My plan is to put in a bluetooth compatible head unit with the ability to play from USB devices and SD cards. Haven't started looking seriously yet as I want to put in my door speakers w/ dynamat.
Does your interface allow the factory system to be pulled out without any changes to make it like a regular HU and changer?
(I'll read your website further for more info)