Car Problem Reports

Mercedes-Benz ML320 Worn spark plug wires may develop micro cracks in insulation

Mercedes-Benz ML320 Problem
6 Reports
Me Too

Model Years Affected: 1999, 2000, 2001, 2002, 2003


As the spark plug wires age and are exposed to heat cycling, they start to develop micro cracks in the insulation around the resistors, which causes misfires and poor fuel economy.

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