Haven't been doing much to the van except driving it.
Added DEF again at 37,000 miles.
Had a tail light bulb go out.
Typical German over-engineering - there is a trick to getting the things off the van, but if you know the trick it is well designed and easy to do (I found the trick on youtube so I didn't break all the clips
Tip for future Sprinter owners:
When you go to places like Advance Auto Parts or Autozone and you ask for something like a tail light bulb for a 2011 Mercedes Sprinter and their computer says they don't carry the part you need.. ask them to look for the same part for a 2007 Dodge Sprinter.
What do you know! Lots in stock!
i.e. their databases are not up to date and do not know that ALL sprinters since 2007 have the same bulbs, etc.