I know what you mean, there are certain (very small, and when it really boils down - irrelevant) features that Mercedes models have been "behind." The 1995 E-class still had a mechanical rolling odometer... when most cars were already switching over to digital. But, really, WHO CARES?
Just one example. I know what you mean... it's kind of irritating and an inconvenience... how often are you going to be driving from state to state, USING the NAV system, and actually have to switch the CD... not often. But you MIGHT, there's that SLIM, once (or twice...) in a lifetime momentary 'interruption.'