One problem related to front seat power adjust has been reported for the 2015 Mercedes Benz C300. The most recently reported issues are listed below.
Unable to move driver's power seat forward into safe operating position. Had to drive car by sitting on front edge of the seat. Brought to dealer for service and seat operation was restored to normal after a software restore/reset. Service consultant could provide no definite information as to what is the cause of the problem. The next day in the morning, the problem reoccured. I am concerned that this is a chronic problem that cannot be repaired. It is a brand new vehicle and I don't know if this is something that affects other vehicles.