The alternator voltage regulator has failed on, _DO NOT_DRIVE OR RUN THE ENGINE until this is fixed, you are going to damage the electronics. You system voltage is going to be over 16V at idle and even higher at speed.

These cars had 2 alternators, Bosch and Valeo. I'm pretty sure they will interchange. One thick wire leads to the battery, the other is key on power to wake the alternator up.