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Q:

no 5 cyl misfires on 2000 Mercedes-Benz E320

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
should I replace all 6 coils or would the 2 that fire no 5 be enough
(3) Answers
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I would test them, just because a couple have failed does not mean the rest will. Test them and fix only what is broken. It would probably be a good idea to replace the spark plugs if they exceed 60,000 in mileage while you have it apart. Ron.

http://www.westsideautopros.com
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your issue is likely not a coil; the plug wires get soaked with oil from the valve covers. you can buy the plug wires
individually as needed.