An operating device includes an input device that receives a character input of a user, a display device that displays input characters in an input field, and a delete device that deletes at least one character displayed in the input field in a deleting process. The delete device is configured, during the deleting process, in the input field, to move a delete element successively over in each case one of the displayed characters and in so doing in each case to delete the character or to mark it for a deletion to be carried out at the end of the deleting process. The delete device can also be configured to, during the deleting process, to detect a sliding movement of a user's finger on at least one touch-sensitive touch field and to control the movement of the delete element depending on the detected sliding movement.