I haven’t had a chance to install and test it out, but the latest Bosch Flow firmware update is now available. Plan to try it out this weekend.
I think it also brings the eMTB+ mode to all Rails with the smart system.
This is mostly for posterity since I couldn't find the answer anywhere else pre-purchase. My Gen 4 Rail already had a wire installed for a front light. It was tucked into the frame under the top tube controller cover.
I can confirm that Gen 5 Rails are not pre-wired for a front light. You'll...