[oldpool]

Changed upper harnesses, lower harness. Ate my last battery, 14.5 volts measured at battery. surging when slowing down. Any ideas? Thanks

 

[sbaert]

Has the voltage regulator ever been replaced???

On a V8 W124, 14.5V should be OK but anything beyond 15V is too high IMO.

Suggest you replace the regulator with a new Bosch unit. They're inexpensive insurance.

 

[Clarkz71]

First thing I would do is check for codes.

Do you have a code reader?

 

[oldpool]

No code reader, my local guy has a proper one. I was going to replace the regulator as it has never been replaced. I thought it may be the regulator since the lights appear to be dimming along with the idle. My problem is no time anymore for my projects. She was a 1 owner vehicle. I have a hunch that all the wiring has issues, I do not know if any of you think that to be true of older benzes. I have a 190e 2.3 also only 68k miles and am thinking of just keeping that. I do love the V8. Changed all the fuses harnesses, throttle, wires caps rotors. It has run real nice but it is the intermittent issues that give me the blues. I have to say that this forum has been a godsend.