Swap coil packs around to other zylinders and see if the faults follow them
--FT Sent from iFōn > On Dec 5, 2023, at 9:17 PM, Robert Koziak via Mercedes > <mercedes@okiebenz.com> wrote: > > Hi All, > My daughter's 2011 Mercedes C300 4Matic (110K) was difficult starting > with the engine shuddering and check engine light came on. She shut the car > off and started again and it ran fine. She said it happened a few random > times in the past but the check engine light never came on and the car ran > fine. > I checked the codes and the following Confirmed/Permanent Codes were listed: > P0300 - Random MisfiresP0305 - Cylinder 5 MisfireP0306 - Cylinder 6 Misfire > Research shows it could be the spark plugs or coil packs. I am going to > replace all the spark plugs. Should I replace all the coil packs at the same > time or just Cylinder 5 and 6? The job looks fairly easy from videos I > observed but the coil packs are pricey so curious if it was recommended to > replace them all now? > Any input on what parts to use? I looked them up on Rock Auto and FTC Euro > and the price and brands vary greatly. > Lastly any tricks to the install I might be missing. > Thanks in advance. > Bob K > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
