Parasitic Leak Help - MBWorld.org Forums

Oct 9, 2021 | 10:57 AM

humroot

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Joined: Jun 2021

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E320

Parasitic Leak Help

Hi all,

I'm chasing a parasitic leak that is draining my battery in about 2 days. Leak is 150ma.

I have pulled every fuse and relay from the three fuse boxes to no avail. Unhooked small battery, no change. Unplugged front seats, no change.

The only time it goes away is when I remove the small positive battery cable on the main battery that goes to the junction block in the trunk.

Next step would be changing the voltage regulator per the TSB...my car does fall within the VIN range and it is a Bosch alternator, but I don't know if the voltage regulator has been replaced in the past.

Any other thoughts from the community before I dive into removing the alternator?

Thanks!
Jamie
2004 E320 4-Matic

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