how to turn off service reminder mileometer in a 1998 merc c250 td?

You're welcome Alan, glad to be of help.

ChicksFan
July 2010

ChicksFan Thank you very much for your instant answer it worked perfectly Alan Wilkinson

ALAN WILKINSON
July 2010

It is in your handbook.

Turn key to position 2 and immediately press the adjustment button twice within the space of 1 second, within 10 seconds turn the key to 0 position, press and hold adjustment button, turn the key to position 2,keep the button pressed the last service indicator remains in the display,an acoustic signal will sound after 10 seconds, release the button.done. (straight from the book)

ChicksFan
July 2010