even when you find the correct number of bolt hole rims, you need to know the ET or offset on the rims, ie how far out from center the
bolt plate is positioned - too far out and tire itself will be mounted inward toward the vehicle's centerline - and besides affecting camber & alignment, will probably cause wheel/tire in the front especially, to rub against something, shocks, fender wall etc
there should be a spec in one of the MB manuals for it, and again, it will be termed "ET" and they're usually measured in MM or metric. I main have it reversed, but iirc correctly, the higher the ET the more outward (away from the vehicle's centerline) the tire's centerline will move. you can usually live with a 3mm deviation from OEM without any issues. Aftermarket wheels usually have it stamped or cast on the back side of the rim somewhere. One of the sprinter owners that optioned for the aluminum wheels should have it on their wheels. Don't know if oem steel wheels always have it listed on the rim