The German TFF forum tries to do an inventory of M3 Highland cars affected by the issue. If your car is affected, please ad some details to this Google spreadsheet:
https://docs.google.com/spreadsheets/d/1OOkSkKkIx_lLYHazF3Gv0y1NBWXwkTf0t3iRusJBYko/edit#gid=0