Please help...i need to know what's missing.
I recently acquired a 2002 M3 Convertible and I'm undoing what the previous owner did to the sound system so I can upgrade to Bavarian Soundwerk system with Dynavin Nav system. This car had the OEM "Business" system. When I took the car apart I saw a few things missing; this is a pic of behind the driver-side rear seat. I can tell there was something there that was removed. Can anyone help?
'02 M3 VERT
PERFORMANCE: InJen CAI, AP Headers & Sec 1, TopSpeed Muffler, AA Tune, RE Stage 1 Clutch, RE FCABs & RTABs, Bilstein PSS10s
ENTERTAINMENT: Pioneer Z150BH, Hertz HSK165 & HCX 130, JL8W7
EXTERIOR: Orion V4, Retrofit Folding Mirrors, Smoked Tail & Turning Signals