Restoring old Mercedes Benz: How can I replace the storage nets on the front seat backs?

I just got an 89 Mercedes 300E and I am attempting to restore it. I am trying to replace the storage nets that are on the back of the driver and passenger seats. I seems that I have to first remove the rear panel of the two seats. I have removed the two screws from the underside of these seats but the panels will not come free. Does anyone know how to accomplish this.