Are you sure the microfilter is the actual problem? The exclamation point on the display means there is a check control message. Can you go into the service menu in the I drive and check which service is listed that is overdue just to make sure it is the microfilter causing this problem. Also, you can check the check control messages to see what warning is listed. If this helps, please accept or post back with what you find and I will try to help you further. Thank you.
I will look into this when I am at work in the morning to see exactly how to reset the microfilter service. Hopefully I will be able to shed some light on why this is still not resetting. Thank you for your patience.
I must admit I forgot to check into the reset procedure with how busy the day was. I wrote myself a reminder for tomorrow. One suggestion, if you have been able to get other resets to work (like oil service reset) you can try to do a battery reset and then reperform the reset of the microfilter again.
Even at the dealer some times the reset with the instrument cluster will not work. We do have a back up where we can use our diagnostic tester to also perform the reset. Occasionally even that does not work and we then try a battery reset. Basically it is like doing a ctrl alt delete on your computer. All you have to do is to disconnect the negative side of the battery for 1 hour. Then reconnect. The first thing to do is to reset the time and date. Buckle the seat belt, shut the door and then try to do the reset with the instrument cluster again. Hopefully it will decide to reset. If it works please let me know and I will post an "answer" post as I am sending this as need info. My goal was to go over the steps again on a vehicle in the shop to make sure there is not a step missing for the micro filter replacement. Thank you for your patience.
I found another 5 series that matched your vehicle.
I hope this will help you to get that reset to work. If after this it still does not work you can try the battery reset and attempt again. If it still does not work then it might have to be reset using the diagnostic tester from the dealer. However, this should work.
To check to see if the microfilter needs to be reset it should be yellow or red on this screen.
The first step is to leave the vehicle off. Get in, shut the door, and buckle the seat belt.
Without starting the vehicle put the key in and press the start button twice so all of the cluster lights come on. Then press and hold the left cluster button. A triangle and exclamation point should show up.
If this display comes up then a step was incorreclty done and it will need to be started over.
Continue to hold the button unil this display come up depicting brake fluid. This is the first item that can be reset. If you continue to hold the button it will go to the wrong test screen and if you wait too long it will go back to the main display. In both cases it must be done over from the beginning by cycling the key off.
To scroll through to microfilter just press the same left cluster button with a quick press and release. Once at the microfilter you have to hold the button down until it shows RESET and then immediately let go and press it again to finalize the reset.