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Has anyone changed their own spark plugs on the GL450? Any pointers/suggestions would be appreciated. Took a peak under the hood and didn't even see the spark plug wires. Do you have to access from the wheel wells?
 

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'07 GL320CDI
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Surely you wouldn't attempt this without reference to factory procedures.

Mercedes makes this easy for you: Star Service CDs and DVDs

DIY means you do it. It does NOT mean you do it without proper knowledge and tools and the investment that requires.

Have you checked your maintenance booklet to determine the replacement schedule?

And, BTW, there are no "sparkplug wires."
 

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