One of this way's should work. If your Radio is still on, just turn off/on.

- Key Position 1
- Turn Radio: ON-OFF-ON
- Press and hold SELECT for at least 10 sec.
- New Menu appears with serial number from radio
- controll with < and > and 1-6

- Key Position 1
- Turn Radio: ON-OFF-ON
- Press and hold INFO for at least 10 sec.
- New Menu appears with serial number from radio
- controll with < and > and 1-6

- Key Position 1
- Turn Radio: ON-OFF-ON
- Press INFO
- Choose RDS from the selection list
- Press and hold THE KNOB for at least 10 sec.
- New Menu appears with serial number from radio
- controll with < and > and 1-6