The CC is completely electronic in his car because it's Drive by Wire.

If it was me, I would clean the throttle body and MAF sensors, then do a "hard" reset. Like unplug the battery for while and touch the negative and positive battery cables together to in a way clear the PCM.

Will this work, I don't know but this is a completely free option and one I would do. TB and maf cleaning should be done regardless if they have never been done.