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Old 12-01-2009, 07:52 PM
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Join Date: May 2003
Posts: 218
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!
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Old 12-02-2009, 08:01 AM
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ich fahre, also bin ich
Join Date: Mar 2002
Location: South Florida
Posts: 1,622
I think you only have 8 plugs. The M113 (E430) uses the 2 plugs per cylinder.
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Old 12-02-2009, 12:01 PM
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Join Date: May 2007
Location: Richmond, VA
Posts: 310
Correct. The M119 only has 8 plugs.
"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles
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Old 12-02-2009, 10:31 PM
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Join Date: May 2003
Posts: 218
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.
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