I bought ML350 with Navigation system.
My wife drives it. I spent some time to get familiar with its navigation system.
It looks like the Navigation system is poorly designed,
no touch screen and typing in address takes a long time, sucks ! (compared with 2005 Toyota Camry V6 XLE's navigation,
Google's navigation, and my portable one,
2013 ML350 is the worst).
Sure, it gots voice command control,
but it is not as easy as inputing addresses, which is what I expected about vioce control.
Brand, keyless feature.
Got a better Navigation with a touch screen and a larger one (Nav on 2013 ML350 is even worse than 2005 Toyota's Nav (2005 v6 XLE).
And also, MBrace is not very useful.
It took me several minute to local my car using my cell phone ($280 per year.