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RETIRED
Join Date: Jul 1999
Location: BOULDER Colorado
Posts: 39,412
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12.5v at rest
13+ at idle
13.5-14 at 2500 rpms.
Poorman's load test.....turn on all the accessories at night with the engine idling. Dimming of headlsights means your battery may need replacement.
A voltmeter on the battery and removing fuse one at a time will track down a circuit that has a draw.
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1983/3.6, backdate to long hood
2012 ML350 3.0 Turbo Diesel
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