mercedes/r-class/2006-2012

Bent spark plug electrode

Hello All,

 

I am a first timer here, so thanks in advance for any replies.  I started noticing some engine shaking and found that it could be caused by misfiring.  I pulled the spark plugs and found one that had a bent electrode.  I regapped it and the shaking stopped.  What could be the cause of the bent electrode?  Should I be concerned about a larger issue?  

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