Yes they tightened things down on the later models, the 722.9 definitely cannot be field coded with a cloned Xentry as it requires a connection back to home base before it will proceed. Which you can’t do with the clone systems. If you let one of these see the internet Bosch will do a seek and nuke on the system and brick it.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech