Simple Spark Plug Question 300E
 

So I went to check out my plugs satuday. But I couldn't seem to get them out. This is the one simple task I've never done, so i don't really know if they should be so tight... I just don't want to break anything trying to take them out. Should i use some penetrating oil ie. WD40?
Thanks

They are taper seat design and take a fair amount of breakaway torque. Always install them with a torque wrench to 10-12 lb-ft.

Duke

.......... and you may want to apply a little anti-sieze compund to the threads of the replacement plugs before installing them.

alright, thanks guys

We're talking plugs, not plug wires, right?

The plug wires require either the special MB tool (or a pair of pliers, in a pinch) for removal. Otherwise you can break the holder(s).

And yeah, over a several-thousand mile period, the differing alloys of the spark plug and cylinder head coupled with heat creates a chemical reaction that essentially "welds" the plugs to the head...hence the herculean effort required to remove them!

haha, so I shouldn't just pull on the wires??? Oops.... they actually came off with with incredible ease, but then again there almost shot too.
Thanks