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why would dual plugs per cylinder wear diffrently?
Just replaced spark plugs in this car. 2 plugs & 1 coil per cylinder. If I understand this system correctly each coil is actualy 2 coils in one housing. They share a power supply but the PCM controls each ground seperatly. Customer just bought this car so no i... Login to read more. 
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| Engine | 3.2 L |
| Trans | 5-speed Automatic (Electronic) |
Vehicle Data
2001 Mercedes-Benz ML320 3.2L
| Engine | 3.2 L |
| Trans | 5-speed Automatic (Electronic) |
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