The first line is the color code for the body and top. 462 is Tunis Beige Metallic, a very nice color IMHO. Your body color is the first reference to 462 and the second is the hard top. H is the paint manufacturer-G is for Glassurit and I don't recall the paint manufacturer represented by the H.
Perhaps others can help with the remainder of the code-I am not sure if it has ever been completely and definitively been determined what all the lines of the data plate represent.
1971 280sl Tunis Beige Metallic (restored & enhanced)
1971 280sl Tobacco Brown (low mileage stock)
1970 280sl Beach Driver with a touch of rust