One alternate method of doing this (don't ask me why it's different):
(Yes, door closed. It's required for the cars, unsure if it's required for ML, but it's no big deal either way, so get in and close the door)
Key to position 2 (ON)
Push reset button (trip meter button) twice and time or distance remaining will be displayed.
HOLD the button down and keep it held down, then cycle the key to OFF, then back to ON (still holding down the reset button!), keep holding the reset button down for at least 10 seconds, it will beep and the FSS will show 10,000.
Let me know how this works for you. It's only a slight difference.