Quote:
Originally Posted by Enabled
For an M2CS car, the base flash must absolutely be a factory M2CS flash with the CS firmware, reporting as M2CS. In my opinion if an M2CS gets a tune, it should definitely be on the original CS firmware, or else it will report as an M2C firmware to dealer/diagnostic systems. (FWIW any M2C can take M2CS firmware in, even locked 2021s, BUT you cannot use this factory flash on an M2C because of factory protections.
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I have a 2020 M2CS US Spec. Are you saying that I can't do a DME swap unless is from a pre June 2020 DME from a M2CS? If so does it have to be from North America? My DME was made in November of 2020 and I think most NA CS cars were made post June 2020.