How-To: The Hidden Menus




i looked at it once, but didn't quite understand everything & was afraid to screw something up...
On a 2012 C class loaner I was able to change the clock display style to a different one but other than that, nothing terribly interesting other than some Internet connectivity settings that I was not able to figure out.
You can go into these modes and scroll around without changing anything if you're curious. If you do decide to change things, make sure you have some idea of what you're doing and what the original value was. I've noticed that changes tend not to take effect unless you perform a reset rather than just exiting the menu.
The Service Menu/Dyno Mode is obviously more useful if you intend to dyno test your car on a rig.
For 2012, you shouldn't need to do anything since it was a standard feature. Not sure about 2011.



