How to reset mecedes FSS after an oil change:
turn ignition key to position 2
press reset button twice within 4 seconds
turn ignition back to pos 1
press and hold the reset button
turn ignition to pos 2
keep pressing the reset button until buzzer sounds and new miles display
appears
turn ignition key to position 2
press reset button twice within 4 seconds
turn ignition back to pos 1
press and hold the reset button
turn ignition to pos 2
keep pressing the reset button until buzzer sounds and new miles display
appears