Well, the SRX has a touch screen for many of its controls, whereas the MB has labels on the screen, but you have to press the teeny tiny buttons off to the sides.
Also, it's the grouping of buttons. The 2001 M-Class has non-radio/entertainment functions placed right next to the radio. The SRX unit does not. By maintaining some logic to the button placement, and placing similar/related functions together, with similar/related functions having similar shapes/textures...it goes a long way.
The 01 M was, as I said, an interface that even after 6 years I don't have it all down. And don't get me started on the "sized, shaped, feel-alike" buttons on the center console that control such widely-varying functions as door locks, defog, and seat heaters, and child lock. All feel exactly the same; you must look down to know what's going on.
3 years as a daily driver 24/7/365, then 3 years as a daily driver during most of December, and then May-August. Trust me, I'm very familiar with that pile. And to further make my point, my Aurora has more features and frustrates me far less with its interface.
Exactly. Cadillac, and therefore GM, often receive praise on the ergonomics of their interiors. GM also came in first on "best nav system interface" on some website I saw a couple weeks ago. Edmunds has said the interface in the SRX was the best they've ever used for infotainment systems.
It's just so stupid to throw that away on a button frenzy. I also fail to see how it's "designed" if the "design" is row upon row of identical/near-identical buttons in an approximate grid. There's nothing creative about that.