I'm useless with this sort of thing - I've got a 99T 156 with the original stereo (the silver alpine that actually fits the hole) which I like the look of. I was hoping to fit the Alpine CHA S634 MP3 compatible 6CD changer but I'm struggling to find out if this is a viable option. It would seem that an adaptor cable for M Bus systems prior to 2001 is necessary (KCA 130B) but this is quite an old stereo. Anyone be able to point me in the right direction? or suggest a suitable (cheapish) alternative? ultimate sound quality isn't a priority - i listen to radio 4 radio 5 and crap music, just like the convenience of MP3. Thanks.