Just for the info, 647 153 10 79 is Dodge 05137615AA
647 153 24 79 is Dodge 05140004AA
The original 2006 parts catalog lists 05166760AA (MB 647 153 28 79)
The 2004 catalog lists two units:
05117562AA (MB 612 153 38 79) (note that it's not "647")
and 05117567AA (MB A612 153 58 79) ... if you have option "NAA", which is the Federal Emissions (i.e. non-CARB)
... annnd.. to add to the fun, both of those two can also be had with an "AB" as the final letters:
A612153387980 05117562AB
A612153587980 05117567AB (gleaned from the MB/Chrysler part number conversion list
View attachment T1N-Chry-to-MB-parts-ref.pdf)
This is one of those cases where accessing the MB database with your specific VIN would cough up what the
current recommended part is for
your Sprinter.
2004 was a transition year... some were 50-state (CARB) compliant, some were not.
What does the paper label on your injector cover say CARB-wise? (2005 CARB example shown here)
--dick