2002 e320 4-matic engine shaking - Mercedes-Benz Forum

 
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post #1 of 2 (permalink) Old 04-07-2008, 07:52 PM Thread Starter
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Post 2002 e320 4-matic engine shaking

my check engine light came on recently and the car's engine shakes at idle and slow speeds.(rough slowing down and stopping). took it to a mechanic and he said that i needed engine mounts.

i took it to autozone to check the code for the CE light. the codes came for misfires in 5 cylinders. i changed all the spark plugs to bosch platinum 4 but it still says misfire in cylinder 2 (i swapped the ignition coil from another e320 but the engine was still shaking) . engine still shakes like before even changing the spark plugs.

could it be the ignition coil that is causing the misfires? but how could it say misfires in 5 cylinders and the car is still driveable. is this coming from the o2 sensor, fuel system or what? any help would be appreciated.
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post #2 of 2 (permalink) Old 04-10-2008, 07:51 PM
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Slight flutters at idle are usually always caused by plug wires. Especially if youve got misfires in 5 cylinders. Im not saying your engine mounts and/or transmission mount arent bad, but they dont cause misfires.

This is why taking it to the dealership is worth it, they have the proper factory equipment for diagnosis.
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