The battery/alternator light came on on my 1997 C230. Changed the battery(it was old) and found it needed an alternator as well. Replaced both and charge light went off.

Now, the Gas gauge is pegged with empty light on, temperature gauge is pegged, rpm gauge is pegged, outside ambient reads 137F, and windshield fluid lamp is on, and the odometer reading is wrong.

I have checked fuses and I cannot find anything blown. Maybe I missed something.

Also, I need the radio code. Where do I find this?

Thank you for your help.