Advice for changing spark plugs in M119?
 

I'm getting ready to change the spark plugs in my S420. Is there anything I should be particularly careful with when doing this job? I've never changed plugs on an engine with coil packs before, so I'm guessing it's just going to be a little more time consuming cosidering I have to unbolt each of the packs.

I will need a total of 16 spark plugs, right? All of the information I've seen says it takes two plugs per cylinder. Thanks!

I think you only have 8 plugs. The M113 (E430) uses the 2 plugs per cylinder.

Correct. The M119 only has 8 plugs.

Thanks. Yeah, I was a little confused because Fastlane and all the auto parts stores say this engine requires two plugs per cylinder. But after taking the plastic covers off the valve covers and looking beneath the coil packs I could only see one plug per cylinder. That's actually great news because now the job will only cost 1/2 as much as I was expecting.:)