Hello, I'm new to the forum. My g/f's C230 had the charge light come on. The car went into a low idle and the tach, speedo, ambient temp, fuel, temp, and oil gauge went to maximum. Ambient temp reads 137F.
I replaced the battery(> 7 years old) and the alternator. Battery charge light is gone.
My mechanic(I own a w210) told me to bring it in and he would reset the computer. This did not work. the car has many miles, so I decided to troubleshoot myself to save her money.
I have read that bad alternators can mess up the cluster b/c of failed capacitors.
I have also found a site, which informs me that the signals for the tach, speedo, temp, and oil come from the N3/7, N3/10, N3/11, and N3/12 engine control modules.
Where are these located? Is there fuse or relay protection? I have checked fuses and all appear to be fine.
Any help would be appreciated.
Thank you for your help.