OK say I move the seat all the way forward and hold for 5 seconds with the key in the ignition, then i take the key out, the seat moves back automatically to let me out, and when i put the key back in it adjusts automatically back again. Same goes for if I have the seat all the way back BUT, it will only move forward. The Auto adjust doesnt work in the middle of the track which is where i sit.

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2001 Mercedes-Benz C320 3.2
1991 Mercedes-Benz 300E 3.0