I need help!

[alguerin]

hi, all...
had mucho work done on my 94 E320 a couple of weekes ago, including battery replacement, so now I'm coded out of my radio (original radio, Ihave the code card as well as all the manuals).
my question: instead of CODE, the radio says C--ERR.

what the heck does that mean? is this a connection problem? do i have to leave the key in position 1 for 24 hours?

it's killing me, not having any music!

thanks...