All in kilometers of course, you get them for 250,000, 500,000, and 1 million. These are non-transferable and your car has to be certified by a dealer. Call the Mercedes 800 number and they'll send you the paperwork. There's also a lifetime award for 1 million miles Mercedes automobiles. You have to have accumulated in various Mercedes automobiles a total of 1 million miles. I don't think you need anything special to get this award, just honesty

Also use the search function at the top right hand corner of the page, I think this has been discussed before.

Kuan