[dvpatel]

What does the booked say that is confusing?

 

[shawkins]

Pretty much the same as B12, only with a transmission fluid replacement.

 

[DrD]

For an 05, B13 = change the oil and filter, rotate the tires, and replace the transmission fluid (along with inspecting the brakes, suspension components, etc.) - no idea if they changed the meanings for newer vans, though.