Steering wheel and seat problem .
 

I have a 2009 Murano that I need a little help or advice with . When I start the vehicle the steering wheel and seat are supposed to move into the preset position but Mine is no longer doing this . Instead the steering wheel is going to the highest point and trying to keep going , resulting in a grinding noise and a clunking of the wheel . It is also not adjusting in or out . When I turn the ignition off the wheel then goes to the lowest point of adjustment also continuing to make a grinding sound . I would appreciate some advice on this problem and whether it would be an electrical or mechanical problem .