BMW 640i xDrive Gran Coupe reverts to Comfort Mode after switching from Econo or Sport Mode on BMW 640i xDrive Gran Coupe

Some BMW 640i xDrive Gran Coupe owners report experiencing issues with the vehicle unexpectedly reverting to Comfort Mode after switching from Eco Pro or Sport Mode. This behavior is linked to the BMW Driving Dynamics Control system, which manages performance based on the selected mode. Owners note that while Comfort Mode offers a smoother driving experience, it may not feel significantly different in terms of shifting compared to other modes. In contrast, Sport Mode delivers sharper acceleration and a more engaging driving feel, while Eco Pro Mode focuses on optimizing fuel efficiency. If the vehicle switches modes without user input, it could indicate potential system settings, software glitches, or sensor issues. Owners are advised to consult the owner's manual for troubleshooting guidance and to seek inspection from a certified BMW technician if problems persist.