I can't find it in the Dodge service info either.
I'm pretty certain MB will have this documented in their Workshop Information System (SprinterWIS).
You can subscibe yourself to SprinterWIS:
www.sprintertekinfo.com and dig around for the code and remedaition instructions.
The computer systsem requirements are identical to the system requirements for WiTECH: WIndows XP or better, Internet Explorer 6 or better, expect you don't need Adobe Flash, just Java for SprinterWIS.
-Jon
PS: Ignore the disclaimer on the SprinterWIS front web page that says, "for 2010+ Sprinters." They have all the docs for 2002 and forward in there.