W123 230 CE Front Seat Removal

I need to remove the seats for cleaning and repair. The two front bolts are easy to get to. The two on the back look like they come up from the bottom
and there is no way to access the head. Any suggestions?
Thanks, Scott
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Sit in seat. Slide the height position all the way forward. Now slide the fore/aft position all the way forward. In THAT order. The rear bolts will now be exposed from the top. They are the same as the fronts. 10mm head.

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