Have you done some additional homework to clarify importing into the US?Looking at an 04 r230 SL600, Vin WDB2304761F082116.
It's a Japan version, with license plate holder for Mexico.Asia, according to the build for the VIN. Not very USA.
How do I determine if this car can be imported into the US. I would not want to modify anything to meet EPA regs.
Are all later model Mercedes such as this one EPA compliant?
Your Ultimate Guide to Importing Cars to USA | USA Customs Clearance
The process for importing cars to USA comes wrought with emission testing, regulations and manufacturer issues. A customs broker can be your driving coach.
I think you're going to run into issues even if the Japanese version comes into USA, indirectly.
The first hurdle is age requirement issue, which I dont believe your SL600 even qualifies for. (Only 16 years, possibly 15 only, depending on the month day of manufacture)