Boy, they could have made this more simple for the consumer. I have gone through this time and time again here.
Ignition on. push button until you see the wrench.
Quickly turn off ignition THEN push the button and hold it while turning on the ignition. Hold this position for over 10 seconds. You will hear the beep, then let go.
PS, there are no bugs in the software. It works.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS