GLK-Class (X204) Produced 2008-2014

Multiple misfire.

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Old 01-15-2017, 11:02 AM
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glk 350
Multiple misfire.

Getting codes po300 along with 302 and 305. Replaced coil on cylinder 2. Seems strange that multiple coils are going bad at the same time.

Before I go replacing the coil on cylinder 5 what other parts might cause a multiple cylinder misfire?
Old 01-16-2017, 12:25 PM
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2013 glk 350
Bad plug wires, corroded connections from excessive moisture, bad spark plugs can all cause misfire.
Old 01-16-2017, 12:31 PM
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If you want to verify its the coil do an ohm test, I'm sure on u tube you will find out how to do it and what reading is good or bad. You might find several are bad or weak.

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