"It's a marriage of elements" that are important to Maybach-class consumers, he says. "It is something that they enjoy coming to. There is something else of interest to them going on."
At the Washington event, which was co-sponsored by The Atlantic Monthly magazine, guests enjoyed Gray's hospitality in what Killen calls his "architecturally significant" home.
Author and journalist Mark Bowden, who wrote the books Black Hawk Down and Killing Pablo, talked about his work and signed autographs for the guests.
Maybach presence marketing events are designed to accommodate as few as two people and as many as 4,000. The events have been held across the United States, Killen says.
The party at Gray's home was the only one in the capital so far, but others are likely. Killen declared it a success.
He says Mercedes-Benz made no payment to Gray.
Gray served in the first Bush White House and remains politically well connected and active in conservative causes.
Gray is a partner in the law firm of Wilmer Cutler Pickering LLC.
Its clients include the Business Roundtable, an organization of the nation's largest companies.
Maybach's two models have base prices of $307,500 and $359,500, including a $2,500 charge for transportation and handling.
The cars went on sale in the United States in mid-2003.
Maybach sold 166 of the luxury vehicles in the United States last year.
Killen says the company is on track to meet its U.S. sales goal of 300 to 400 cars this year.