So before everyone asks, I did search and look at the FAQ and found the CEL trouble codes and what they mean. I have an 03 CLS 6MT and when I went to AutoZone today to get the code read, they had one they weren't sure about. It was P1399. When they brought it up in their system it came back as an OEM code.

Does anybody know what this means? or where I can find the answer to my question?

Thanks!

 

https://acurazine.com/forums/showthr...ighlight=p1399

that should help

 

I happen to have my shop manual open to that page. it is a cylinder misfire

 

yeah its a cylinder misfire.. mine went away after i reset the thingy..