I believe I have distronic, I page thru on steering wheel and it shows up with I believe a changable MPH number. How do you activate it and what does it do?

 

There is a "sticky" at the top of this forum page that has a link to the GL owners manual. Distronic is an option & is operated by the cruise control stalk.

http://www4.mercedes-benz.com/e/cars...html#d13e21426

Go about 1/3 of the way down the page & you'll see the picture of the cruise control stalk that has the Distronic option.

I don't have Distronic, but I believe all GL's have the digital MPH reading that you can find by scrolling through the menu. It is not adjustable...it merely shows a digital display of how fast you are traveling (vs. reading the analog speedometer).

 

Thanks Jen!