in case you were not at the September FESTOOL CONNECT in Lebanon, a German work vehicle upfit equipment supplier, BOTT   http://www.bott-group.com/vehicle-and-van-conversion-and-storage-equipment/index.html exhibited a Mercedes Metris outfitted for use specifically with FESTOOL products. I'm sure you can find particulars if ask Minnie Gleb at Festool USA.

The other source which might prove helpful is to ask for referals/referfences of Metris users is , of course, your nearby Mercedes Benz dealer.

Daimler is making a concerted effort to expand traction for its work vehicle product line in the US. Here Mercedes is known and perceived as a luxury brand, akin to the perception some have of FESTOOL as a luxury - without realizing that the companies earn their business primarily in the work-for-hire market. But perceptions don't change quickly. To that end I have heard that Mercedes may be planning work vehicle dealership facilities separate from cars. Not widely known in the US, Daimler AG is the worlds largest builder of trucks and work vehicles (think also FREIGHTLINER, THOMAS school buses and more)

All the best with your efforts in the new year!
Hans