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Old 10-16-2001, 03:34 PM
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G-Benz G-Benz is offline
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
If your charging system is operating properly, you should see between 13 - 13.5 volts at the battery, but no more than 14.4V.

Also run the engine at 1000 rpm with assessories on (A/C blower, headlights, radio, wipers, etc.). Your voltage should still hover in the 13's.

12.5V is borderline. Below 12.5V, and you have a charging problem...
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
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