I found a 1991 350 SDL on ebay. Seller says that the engine was replaced by Mercedes at 65,000 miles. Sure looks like a nice car. Item # 320096016170
http://cgi.ebay.com/ebaymotors/91-Mercedes-350SDL-DIESEL-EXCEPTIONAL-CON D-LOW-MILES_W0QQitemZ320096016170QQcategoryZ6330QQrdZ1QQcmdZViewItem I wish I had an extra 9K to buy it. Donald H. Snook 1990 300SEL 136K
