I know on the rs2000 the black rear pannel signafied it was a custom model but i guess you could have it as an option on a non custom.I remember readind some where that mexicos didn"t come with the black pannel and i know early mk2 mexicos came with crome door handles too very early ones that is.RSOC would be the place to ask as they have a register for mk2 mex"s and rs 2000.