Yay my 16 year old car is home. Battery had enough power to lower the windows despite sitting all day in the hot sun. Last night it did not have that ability. The cables are tight. I installed the battery a couple of years ago. I think it is probably alternator or voltage regulator related because of the symptoms. The car just died while driving. I figure if the alternator and voltage regulator were working correct the car wouldn't just die while driving even if the battery got weak.

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1993 Benz-190E-2.6 liter