The MPG/miles to empty/trip computer function is totally absent on my recently acquired 2001 E320. When scrolling through the screen options such as Speed/odometer/messages/etc. the trip computer options are completely absent. Not even a blank screen. I have reset the computer to "factory settings" with the R button with no change.

Any one know of this issue and have a remedy?

 

The fuel gauge seems to work fine. No diagnostic faults can be found. The car does not have a phone and the phone buttons do not activate anything. The system selection reset to factory settings makes not difference. No fuses are faulty. There is to Trip/MPG/miles to empty options do not appear when cycling through the information system settings.
What do you mean by, "a manual for the TRIP"?

Any other thoughts?