Now that Freightliner is the only ones selling Sprinters and no longer Dodge dealers where do you get repairs?
For 2009 and earlier Sprinters, most Dodge dealers that were Sprinter dealers are also still doing Sprinter repairs for the model years they sold. Much like the Mercedes dealers who were unable to even order parts for Sprinters, the former Sprinter Dodge dealers cannot order parts or perform warranty work on 2010 and later model year Sprinters. It may change to where they can order 2010 parts, but they won't be able to perform warranty work for sure. The Mercedes dealers can now order parts and perform service on Sprinters older than 2010, so that's not a problem anymore. By and large, since Mercedes technicians are Mercedes trained and are immersed in all things Mercedes, you'll get better diagnostics and repairs at Mercedes dealers.
I had some work done at that Southtown Dodge in St Louis. Far as I know they are still doing Sprinter repair work, and they have a really good Sprinter tech there (several of them, actually). The key is a good Sprinter tech, regardless of where it's repaired. Music City Dodge (off I-24 just south of Bell Rd in Nashville) has a good tech. So does mine at home (Parkway Chrysler in Benton, KY). Freedom Dodge in Lexington, KY has a good one, a
really good one.
There are a few Dodge Sprinter techs that are on par with the techs at Mercedes dealers, but not many.
As for where to buy a new one, it doesn't really matter, Freightliner or Mercedes. Go with whichever one gives you the best deal. Either will perform maintenance on it.
Mine is a 2005 Freightliner, but I've never had it repaired at a Freightliner dealer.