There are two sets of miles/date on the display:
Next oil change - this is the one that can be reset by scrolling down on the MMI and clicking YES
Next service - this is the one that the dealer (or VCDS user) resets
So what are the two sets of miles/dates reading?
Google tells me to reset the lower display...
With the ignition on.
click on address '17-Instruments' and then select 'ADAPTATION'
Go to the 'CHANNEL' box and change the number in it to '40'. Click on 'READ' then in the 'VALUES' box, change the value to '0'. Click 'TEST' and then 'SAVE'. A box will appear to ask you if you are sure, click 'YES'
Carry out this same procedure for the following channels, AND IN THIS ORDER;
40, 41, 53, 55, 02
when complete, exit VCDS by clicking 'DONE, GO BACK' and then close the application.
Switch the ignition off and then back on. If you've got the sequence above correct, the light will be out.