First, have you ever taken your seat off before?
Second, if you have, not sure how to approach that.
Third, if you haven't, from what I remember you need to place your knee onto the rider's part of the seat. Reach over and try and turn the key, then pull the ring under the left side of the seat to pull it out. Hopefully you will here a click and you can grab part of the seat and lift up.
Again, if you have taken the seat off before and had no problem and this is what you are running into now...you may have to ride to the dealer and have them fix it or figure it out.
Good luck,
Dennis
37 dtg Dubai
38 dtg Home