Yup! Here's some sales hype from an eBay listing for a 350SD:
"Up for bid is this unbelievable 1991 350 SDL Mercedes Benz 4 Door Coupe. It has the 3.5L-IL6 Turbo Diesel engine is a most highly sought-after, rare and considered the most reliable engine Mercedes has ever produced." Obviously the seller didn't check out the Shopforum!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=180092196953

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body. '87 300D w/ Sportline suspension. No more '79 300TD w/ 617.952 engine at 367,750, it was my annual driver to Texas and I sure don't miss it poor A/C heater system!