Thanks Y'all. Even though it fit perfectly, literally the exact same size and shape of the carpeted mat and the carpet and sound insulation under that, I'm going with the obvious and concluding it's the winter mat and can be removed. I'm assuming the 190E/201 part superseded whatever came before for the face-lifted 107. Too bad I only have the passenger side. I don't plan to use it, but hate to send it to recycling. If anyone can make good use of it, it's yours.

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Michael

1988 300 SL (5 Speed)
1994 E320 Wagon
1997 C230