Think those seats were introduced in 96 revamp! Could be wrong, think i have seen them in earlier cars. can't remember! Got em in my 98! As for the radio cassette, i had one for a week when i picked the car up before i fitted my head unit. If its the one i think it is, then you should have a select button on the left and a display button on the right. Using these in an order i can't remember and holding one for a couple of secs you can adjust the time using the scan/search or vol buttons! Think its the select button you hold down for a couple of secs and the display button saves. Somink like that! Play with it, thats what i did. With a little bit of logic you'll get there in the end.
Sorry so vague but i hope its helped if only pointed you in the right direction!
Come on guys one of you must know for sure!