Rear BM54 With Navigation
The high line MFD head unit had a cassette player behind the motorised screen and a CD changer in the glove box, the tuner radio module (BM54) is located in the rear of the vehicle in the rear left quarter panel.
The vehicle is usually amplified via the with LEAR Active Amp (XQK000020) or with the LEAR DSP Amp (XQK000030). You can check this physically in the rear quarter where the navigation drive resides.