Swap outMB's 6 cyl engine needs special synthetic motor oil, because of the recent (2010) emission changes. The oil must meet MB specs so you do not damage the engine and foul the particulate filter, which are now installed on diesel engines. I believe you would need to take your unit to a MB dealer, that services Sprinters (post Dodge era) since Diamler Benz divested themselves of Dodge a few years ago.
If you are familiar with oil changes, MB Sprinter is not that difficult when changing the oil. You need to allow for the greater oil capacity when draining the oil. I believe it holds around 15 qts. Also, you will need a 14 point oil filter socket, to revove the housing to swap out the oil filter.
Always, and I mean always, keep documentation, receipts, etc. to keep your engine warranty in good standing with the manufacturer.