Might try local MB dealer, sometimes they get take-offs, where they replace the stock rims with aftermarket rims the customer wants and the stock rims can start to pile up. I picked up a full set of Pure rims that way and they were surprisingly cheap.
I have a pair of front wheels taken off a 2008 Passion; same wheel. Complete with good tread on tires and TPMS. Have since sold the 2008 and have a 2016. Located in Sacramento, CA. Will sell at very reasonable price for the pair to clean out garage space. 916-283-6742