Originally Posted by MotorCity57
I should add that you'll have to find a Mercedes or Freightliner dealer to perform maintenance on the 'Sprinter' part of your Interstate. Not all Mercedes dealers are authorized to work on Sprinters. I was lucky enough to have a Freightliner shop within 5 miles of my home, so I have all the oil changes & scheduled 10k maintenance done there.
If you buy new, you might not even have the option of Freightliner dealers until the warranty expires. Some states have laws that forbid cross-brand warranty work. For example, in Louisiana I can only get warranty work on my Sprinter done at an authorized Mercedes Benz Sprinter dealer (Baton Rouge) even though there's a Freightliner dealer closer (Slidell). But once the warranty expires, my options open up.