Please help. My husband is ready to take my car to the junk yard!

I have a 1994 C280 with 82K miles and I love it but it has been acting up. It was stalling and I read the forum, my husband replaced the OVP and now the battery light and ABS light come on. He said the battery and connection are fine.

From what I've gathered on this board it may be the brushes are bad or the alternator? But the lights were not on before he replaced the OVP thing, could he have done something wrong??

Thank you for your help, it is much appreciated!!!!
Robyn