To me it looks aftermarket, could be why the Nav needed the code as something else was fitted by a previous owner. The OEM cabling is usually wrapped in fabric tape, this could be going off to an iPod interface or another interface box.
When I bought the C5 A6 that I had before the Volvo I spent a few hours pulling out miles of aftermarket cabling from a cheap DVD headunit with bluetooth and Nav and refitting the OEM radio and also discovering I had no code.
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Manny
2004 A4 1.8T Sport Cabriolet, 89K Miles
Past
2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 197K miles.
2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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