Lufthansa used to, and perhaps still train their pilots, to readback what the pilot has dialed in and then no further confirmation is done among the pilots.
They have been told to start the readback with the callsign in order to give time to the other crewmember to dial the numbers in the FCU.
So a LH pilot starts his readback with the callsign and then reads the heading and/or the altitude he sees in the corresponding windows of the FCU.
Sabenaboy