http://www.whnet.com/4x4/sprinter.html
Go to "Automatic Transmission - Diagnostic Tear-Down Procedure service bulletin"
Chrysler issued a service bulletin for automatic transmissions. For the NAG1 Sprinter 5 speed transmission they recommend a fluid change interval of 60,000 miles and ATF with Mopar part number 05127382AB. Mercedes-Benz also sells an ATF suitable for this transmission with part number 001 989 450310 with a list price of $7.50 per liter.
issued 4/8/2006"