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2008 GL 320 CDI, 1999 ML 430, 2001 Porsche C4
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79 Posts
Discussion Starter · #1 ·
I had this about a month ago. Says a misfire on cylinder 5 and 7. I had the spark plugs change and Advance auto parts erase the code. I changed my oil last week and put some serpentine belt conditioner to my belts( bad idea made the belt more noisy/squealing sound) then the CEL light came up. Went to the local Advance auto parts and checked again it was the same codes. Do you think I have to change the ignition cables for the mentioned cylinder? Maybe somebody can give me advice before I buy the ignition set which is expensive about $ 55 each and I will need about a total of 4 for the 2 cylinders. Thanks in advance for any suggestions.
 

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ML550, W212 E350 4 matic, 1966 Corvette C2 convt.
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2,675 Posts
Go to the dealer and have it diagnosed correctly with the Star diagnostic system it will eliminate guess work and throwing parts at it. All the other readers will only give you an area in which to guess
 
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