M3 DSC is either on or completely off via button press you’ll be able to tell the difference pretty quickly particularly in wet or slippery conditions. I’m not 100% on whether the dash indicator will work or notUpdate: it wasnt fried. I reflashed it to the m3 dsc flash again and it worked fine,just like before. I connected the dtc button to ground and no lights come up on the dash. I check the continuity and its fine. Does the m3 have a different light than the standard 335 kombi? If thats true, how would I check to see if dtc is on or not?