By mistake I have reset ASSYSTPLUS oil change indicator and now it shows 25.000km to next service. Could you help me how to undo it to previous state which I had around 13.000 km to next service. I have a free service plan on my vehicle and now it shows as the service was done but it was not actually.

 

Maybe somebody has better information, but as far as I understand it can't be undone.

 

Can be done by coding but best option is that with the next service you just tell them you messed up, they will understand

 

You don't need to do anything. Dealers mostly follow actual mileage and time compared to last time service was done. Or, they will do the service whenever you ask for it regardless of that oil reset info (as long as a reasonable time/miles have passed since previous free service was done). Dealers know that this can be re-set easily, and they won't even worry about it (other than doing another reset once they complete the service).

Since you know how many miles left until next service is due, just take it to service when service is actually due. If you are too concerned about it, just send an email to your dealer and document when this happens, miles, and let them know when you expect to bring it in for oil change next time (but I wouldn't even worry about that).