Mercedes E-Class W212 (2009-2014) time clock setting adjustment - How do I change the clock on my Mercedes? It's easy to set the time: →Turn on the ignition. →Press "MENU" on the multifunction display (MFD) screen. →Select "Settings" and press "OK". →Select "Time/Date" and press "OK". →Set the time and date using the "UP" or "DOWN" buttons, and confirm with "OK". →Exit the settings by pressing "BACK".