Hello Guys. I've got a bit of a problem on my BMW.
Yesterday my battery went completely dead (9V).
I bought a new one this morning thinking that the battery is gone as it is 10 years old.
Started the car after and everything started fine. Checked the battery with the engine off(12.5V). Started the engine and voltage went to 14.2V but after 2 to 3 minutes started going down slowly and stopped at 12.3V. What do you think the problem might be? I think it is the voltage regulator.
Please note that there is no light coming on the dashboard.