I have a similar problem. I took it to the dealership and they believe the motor is going. It costs $750 for the motor and approx $800 labor to replace the motor. Since I do not use the feature I set the steering wheel where I wanted and pulled the plugs from the motors. In the manual for the 98 GS300 it says that you can have the dealership disable the feature where the steering wheel moves out of the way when you remove the key.