Thanks, Gilly. Fortunately, I didn't need to take out the bottom half. Just lined up the plastic trim with the seatbelt holder, reattached the top clip (what an overly designed clip!) and popped it back in. Every once in a while, its an easy one I guess.

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)