had a phone call the other day off one of the previous owners of my car.. she was the one before the one i bought it off, I managed to find her off the previous owners log book.. anyway i contacted her last year, she was only about 5 miles from where i lived she had owned my car for about 4 years.. and gave me lots of information about the car.. anyway she foned a few days ago to say she had come across the previous m.o.t.s, and a radio... now bear in mind my car currently has a sony mp3 unit with usb stick (fitted by her)... when i bought her car there was an autochanger fitted in the rear storage compartment in the car cabin not it the boot.. this was a blaupunkt 10 disk unit... and had the cartridge missing.. anyway she gave me the original blaupunkt santa cruz mp36 head unit and the original autochanger cartridge... i have removed the autochanger but kept it, as thought the extra room in the cabin rear compartment is better used... what i was wondering was... would this blaupunkt setup been a bmw option when the car was new in 1998 or would this have been an upgrade to the original bmw radio at some stage ? any ideas...