RepairPal Certified shops can diagnose and repair your 1997 Mercedes-Benz E420. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
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charge the battery overnight, then test the battery to determine that it passes a load test. once the battery is
tested and proves okay, reinstall in car, then test the
the charging system output. this is the same method a
shop would use.