Edmund, although I've never examined the center brake light configuration of a 2001 210 car normally there is a tab on either side of the brake light trim piece. Use small flathead screwdrivers, or small plastic wedges, to release both tabs simultaneously and slide the trim piece forward. Once that piece is removed it's obvious how the center brake light assembly comes out so you can access/clean the rear glass in that area.

There should be no need to remove any of the other trim pieces that you mention.

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Fred Hoelzle