5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
The motor has most likely siezed if there is no sound (seen this in other BMW's) the motor will have to be replaced (and it is no easy task!) there is an opening in the rear of the motor to manually run the seats forward and rearward to access the seat retaining bolts (note that this takes FOREVER!) good luck
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