Location for Shipping: North Texas

Same style hitch shown here: https://www.summitracing.com/int/parts/cht-117442/overview/?cm_mmc=pla-google-_-shopping-_-srese1-_-curt-manufacturing

I cannot locate the lock-pin that allows removal of receiver. I repainted it with paint used on my diesel work-truck rocker panels. Looks great and needs to be used! $70.00 + Shipping makes this something to consider. Yes, I will include mounting hardware.
also have om606 turbocharger for $50.

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-“Never trust a mechanic who drives new cars. They're either charging too much money for their work, or they can't keep an old car running - maybe both.”

A few questions:
-Do you know if this hitch will fit a W210 body?
-Is there any way to get a new lock pin? If so, where can it be purchased?
-Is the OM606 turbo in good, working condition?

Thank you,

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Ed
-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)