That is a ramificator. Like layovers to catch meddlers. Honestly I don't recognize that contraption.
I remember I called a boy in Sonoma (or was it Solono?) about that car when it was for sale. I think it was listed in Craigslist. He didn't know what he had and I didn't want a divorce so I passed on it :p
Please send more pictures though

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!