I think unless it has been mis badged that it would be the 5.0 because the 500 was avliable in Germany since the start of production. I'm pretty sure that 83 was the first year of the coupes. 5,000 Is a little much in my opinion unless the a/c works, the suspension is good, and the paint is decent. The car being gray market may not effect the KBB but if you know about the cars the 60hp more makes a diffrence.