I believe you may be correct; I suspect they are not the original hue. In some areas where chipping occurs, a raw metal finish is visible underneath; yet, a few minor chips reveal a glossier silver appearance. Regrettably, I am unable to locate any wheel colour references on the internet VIN decoder websites. I have requested a report detailing the car's original specifications from Mercedes, but I doubt they will provide it. Let us observe! Thank you for the information.