does anyone know how to reset the maint. wrench icon? I do my own work but can't figure this out. I have a 1999 SLK 230. thanks

 

it's been guiet here not to get a push or press the left instrument cluster button by now.

 

I know the procedure for 1999 ML320, it maybe same:
Turn key to pos.2 and within 5sec. press odometer reset twice. Turn key to pos.1 then press and hold same reset button while turning key back to pos.2. Continue to hold button untill buzzer sounds or new 10,000 miles interval is displayed on your odometer.