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Whose slide hardware do you have on this? What name, if any is on the switch? There are 5or 6 makes of slide hardware available and some make both all electric and hydraulic powered units. Once I know this, I can give you the information you need here. Your Owner's Manual should tell you whose system you have as well.
You should just be able to get this adjusted or repaired so it closes properly. The manual retract varies from maker to maker. Get back to me with this and I can assist you further here. All follow ups are included in our fee and expected.