I have not tested this since an MDSC unit is not appropriate for my configuration (Active Cruise) however, I believe MDM should work with the MDrive code I have in place. Have a look at how "mdrive_message_bn2000" is populated in drivetrain.ino for DSC. It *may* require removal of the send_dsc_mode().
I may test this in a few weeks if I get the chance since it could be nice to have the toggle.
@Adam06 Your main problem is going to be the N55. I don't know how/if sport throttle modes are implemented in the Bosch DME. This project currently relies on the MSD81 for engine related sport control.