seat motors
 

my passenger seat in my 98 ml320 wont work forward/backward. i have another ml and ws going to just swap the motor from the old one to my new one but having some problems figuring out how to remove it. even saw some posts saying that it cannot be removed and the whole seat bottom must be purchased/replaced to fix it. just wondering what the case is? i can just replace the whole seat for seat but the old seat is a little beat up compared to the new one thats why i wanted to change just the motor.
anyways any help would be appreciated thanks

leezy