All modern car regulators keep the voltage between 13.5 and 14.5 volts. Something in my alternator recently failed and the battery light, abs light kept staying on. When I checked the voltage the car was at like 15.3v so I just replaced the alternator weeks ago. All is fine now. I've added a ton of extra options to my car that's why I beefed up the electrical system. Currently working on adding something else. As soon as I finish designing everything and testing it I'll post it so others can add it if they choose.

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1990 190E 3.0L