Just a little FYI on those certificates. If you plan on framing them as I did, you will have to trim the certificate. You will not be able find a standard frame that will fit the certificate. I gather their standard for paper is different. The certificates are 8x11 3/4. So you will need to cut it down.
When I sent in my application for the 250K badge for my TD, I filled out the portion about awards received on previous cars. I mentioned the 250K badge I got for the SD. Well, not only did I receive a cert. for the TD and badge, but they sent along another cert. for reaching 500,000 Km. It even has my name on it on the top. In German it basicly says congrats on the accomplishment and happy motoring. It says Daimler-Chrysler at the bottom. Also, I got a lapel pin for 500,000Km. I was always under the impression that only those who actually put 500,000KM would get a pin. I have only put 15K on the SD and at the time only 3K on the TD.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member