In the heyday of gray marketing, I brought a half dozen or so cars in myself. I wonder why you would want to do that today, as the market forces of the early to mid 1980's no longer exist. The price of the car in Germany, considering the exchange rate for Euros/Deutsch Marks and dollars is very much in line with the US price today. This was not the case in the 1980's as the price of MB's only went up every year when the dollar value dropped, and when the dolllar value suddenly rose, to nearly twice the value it had been when the US prices were set, MB just left the prices high. These conditions made buying the US equivalent car, shipping it and converting it cost about 60 to 65 % of the equivalent model on the US showroom floor. You did not get much of a warranty, but in those days I had little trouble with the cars in the first couple of years. And as Larry noted the procedures are more cumbersome or restrictive (meaning expensive) and the people involved are no longer as easy to find today, so they specialize in models not imported to the US. MB recently closed the last gap in their product line of significance when they brought in the Gelaendewagen and bought out the guy importing these himself. By the way, the MB price for a Gelaendewagen is about half the price the grey market guy was selling them for, which indicates the kind of price penalty you are likely to encounter brininging your own car into the country today.
Good Luck, Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)