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With the 6 seat interior you can move the seats with the button on the seat or via the touch screen. Just keep in mind that the 6 seat interior will not fold flat like the 7 seat interior.
In the 7 seat configuration the middle row can manually be adjusted to slide forward. With the Model X interior update only the 6 seat interior is electronically controlled through the touch screen. Let me know if you need a sales rep to help you!