Is it possible to retrofit a Facelift or Q3 Climate Control Unit in a pre-facelift A3 8P? 1) Which parts are required to be replaced? I already got the facelift double-DIN center module, and I know that the Q3 Climate Panel need to be trimmed to fit. 2) Do I need to replace the complete Climate Box (eg 8P1 820 003 N, Q or R) to do the retrofit in a pre-facelift A3 8P (57-plate/2007) ? http://allegro.pl/audi-a3-8p0-sportback-10r-nagrzewnica-8p1820003q-i5111327092.html 3) Is this Retrofit possible without replacing the Comfort Control Module? I have an 8P0907279K installed. I realize that it is an extensive job, but is it possible to do this Retrofit?