Before my oil change i noticed a wrench in the left corner when I start my on 1999 Mercedes-Benz ML430

vehicle, along with that shows a number starting at 900 since then I have had a oil change. Can someone please tell me how to reset? If it is not reset will this be a problem?

Asked by for the 1999 Mercedes-Benz ML430
Try this; While doing this pay attention, Get in and close the door, turn the key on and push the '0' button twice within 2 seconds, the wrench should show if not already on. Turn key off, and press and hold the '0' button before turning back to the on position and continue to hold, it should count back up to around 7000. That should do it.