audia3erx

I've been driving a 2013 A3 1.4 tfsi for a week and it has been great so far. I had used comfort mode for the first couple of days and I could tell the steering was smoother than in other modes. But then I switched to efficiency mode and I've been driving like that for the past days. But tonight I switched to comfort mode again and I noticed that the "C" letter next to the gear number was missing(unlike "E" which gets displayed in the other mode) and there was no change in steering sensitivity. In fact E is the only letter which is displayed when selected.

What happened?