Can you confirm that the UK version was not fitted with the ability to switch them off? Victoria is in the UK, so that would explain her inability to switch the bags off.
Why would the safety of UK babies not be as important to Chrysler as USA babies?
Then again, the side panel starts with 170 xx xxx xx, so it's a R-170 part, which is Mercedes-Benz. Germans don't care for Brits, so... that might explain it.
I still have the part on my desk at work...