undo all screws you can see around the outside of trim. maybe some hidden ones under armrest or switch. even when all screws out panel very tight on clips. you will need to hold door and yank trim towards you. id start with bottom right corner in case you left a screw in. the white plastic clips sometimes break. the mirror plugs into window unit on door and wire clips on from inside door to stop it getting caught in window. you just squeeze clip and push through door. then i would tie some wire very securely to end of old plug before pulling mirror and wire out of hole in door.then untie it when it is through hole and old mirror off car and tie new plug on mirror very securely onto wire and pull other end gently to fish wire through to door window unit. otherwise it is very tricky to get hand up to pull wire through. and dont forget to fit clip back in door bit fiddly that bit.
me, May 2010