EP means emergency program. Many possible reasons I'm afraid. However as Mike says its worth checking connections. One possibility is the CAN (Bus Controller Area Network)
bus connection. If the CAN
communication to and from the gearbox isn't working then the IPK (Instrument pack (IPK from the German))
displays EP and the gearbox operates in 'limp home' mode. If you could get it to someone with a T4 (Testbook version 4.Computer Diagnostic System)
you would probably get some clues quicker.