Here's a couple photo's of this rare wagon, I noticed locally recently. Doing a search shows there may have been ~123 made, but someone else might have better info. It's sitting at a local repair shop, maybe the owner is on this site to give more info too

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83 280TE- 5 spd, 16.5mm rear sway
85 280SL- 15" Bundts, 5 spd