Unfortunately, the only hitch available for your van has a 1-1/4" receiver. The Rola Enclosed Cargo # 59109 will not work for you since it requires a 2" hitch.
Instead, I recommend the 20x47 Reese Cargo Carrier for 1-1/4" Hitches - Steel - 300 lbs # 63155. This will work great with your 2001 Mazda MPV dx. It is possible that you could open your hatch with the carrier on, but I am unable to verify this. Once you add cargo, it could further interfere with your hatch.
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I checked with Curt and the Curt Trailer Hitch Receiver - Custom Fit - Class I - 1-1/4" # C11805 you were looking at is confirmed to fit all models of the 1983 Mercedes-Benz 300TD, so it will fit your sedan just fine.
I included a picture of the # C11805 installed for you to take a look at. view full answer...
I do have an option for you but there aren't any custom fit towing mirrors for a 1980 Mercedes-Benz 300TD. The only option for this vehicle are universal fit mirrors, for which I recommend the CIPA Universal Towing Mirrors part # 7070-2. view full answer...