If the car were mint with impeccable records, maybe.
Look at eBay completed auctions for a baseline.

The cabriolets are going to be gold plated collectors items in the future, but they are bottoming out right now and there are lots of nice ones (or cheap ones) to choose from right now.

Lovely cars, I love mine.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles