Agupta...
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.'

OVER IT!

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)