Cd400 memory reset

[davyboy1973]

I’m looking for some help. I can’t get my memory on my cd400 to reset,tve voice message “memory full pairing failed” comes thru and I tried going into the config option but it does not have any phone settings option, apart from disconnecting the battery and hoping that the radio does not have a code ( which I don’t have) is there any other way I can reset it so I can connect my phone. 

Thanks in advance