Last week I installed a new Sony MP3 player in the Mark but the stock speakers have to go. What size are they and how do I go about accessing them?. Car is not here to look at (wife has it at work) but are there speakers on the rear deck?. Dont think so as there were only 4 speaker connections when I was installing the head unit. How hard would it be to add speakers to the rear deck?. Anyway I've got a whole bunch of stereo stuff laying around from past vechicles (amps, subs, speakers, eq's,) Thanks.