Quote:
Originally Posted by 760dave71
well i put the switch in and didn't start.. jump it at the starter and firer up... check the volts at the battery while runnig and it was 14.86 here's a funny question. my 2006 nissan frontier battery with no key on reads 12.52 volts, now when the meredes is off it reads 13.87 volts. is my mercedes battery wasted?????? also when i keep the charger on it seems to fire up more consitant.. i do have a clue on this.... o' well, i'll see the dealship when i can.. nearest one is 200 miles......... love the car anyway......
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If you switch on your headlamps for 10 seconds and switch off then test the voltage it would have dropped.
I have seen this happen on a car I had, the SG of the electrolyte was out of whack, there was more acid than water, some distilled water and placing the battery on a tire to shake it up and put back into the car solved it. In most cases running like that for too long can render a battery completely dead.
I check the SG of the electrolyte every second oil change, I have added about a glass worth of distilled water in 2 years. Still cranks good - I have the white MB battery.