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Discussion Starter #9
Spark plug change 300SE/300SEL (m103 engine). Service manual says 10-20 Nm torque for spark plugs with tapered seat. (It is document 1580 in the maintenance section on disk 1)

 

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Discussion Starter #10
Another spark plug change on the m103 (300SE/300SEL). Kent has some good information in this video. Several different spark plug removal tool is available on amazon and probably your local parts store.

 
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