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No, the seats in a 98 Cadillac Deville are all electronic so they cannot move manually. You will have to get the electrical components fixed before the seat will move.
There is a lever under the seat at the front edge.
NO you need to make sure you have power to the seat
Move the seat all the way back. Remove the two bolts in front of the base of the seat. Move the seat all the way forward. Remove both bolts at the base of the rear. Wiggle the seat until it comes loose and look for wires underneath that may go to the seat motor and seat warmers.
Check to see if anything restricting movementCheck to see if cable disconnected or brokenSee if you can manually move cable to lower seat
Move the seats all the way back, unbolt the two bolts holding the front of the frame to the floor. Move the seat all the way forward, and remove the two bolts in the back. Tilt the seat back, and unclip the wires underneath the seat.
Remove the bolts and disconnect the wires and pull the seat out
under the right front seat
there are 4 bolts on the bottom of seat to unbolt and a power connection for power seats that you disconnect.
Under front passanger seat.
Move it to the front seat!
On an 2011 mercedes Ml 350 the battery is located under front passenger seat