Spark plug wire length
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Joined: Dec 2023
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2001 E320
Spark plug wire length
Hello, I ordered new set of wires and plugs, they are ngk brand. I have the 2001 e320. I have never replaced wires on this particular car. The wire set sent to me has 12 wires all the exact same length, but what I have seen online is that there should be different lengths. Which is correct?
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'99 and '05 E55 AMG
Here are the part numbers for an E320 after model year '00.
https://nemigaparts.com/cat_spares/e...asis=21006566Y
Verify that matches the engine that is in your car.
https://nemigaparts.com/cat_spares/e...asis=21006566Y
Verify that matches the engine that is in your car.
Last edited by bbirdwell; Dec 10, 2025 at 08:55 AM.
Thread Starter
Junior Member
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Posts: 29
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2001 E320
Yeah, I have the 3.2-liter V6 engine M112 engine, meaning that ngk sent cables they said were for my car, and confirmed it when I wrote to them about his issue, yet they are not the correct ones since they are all the same length!
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'99 and '05 E55 AMG
Correct. You have the V6 which requires 12 spark plugs and cables.
The wires you ordered can work. The catch is you now have longer wires dangling in the engine bay.
The wires you ordered can work. The catch is you now have longer wires dangling in the engine bay.
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Thread Starter
Junior Member
Joined: Dec 2023
Posts: 29
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2001 E320
Thanks, but if I used these cables, would longer cables be the only issue? Would there be wrong voltages, etc. Not as good performance? If the only issue is longer cables, I can handle that.
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MBWorld Fanatic!
Joined: Jan 2014
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From: Republic of Texas
'99 and '05 E55 AMG
If you get numbers way off from the above, perform an internet search as there are several different "flavors" of wires with varying resistance.
I have used in multiple engines wires of vastly differing lengths (shortest 6" and longest 2') with no issue. Just be sure you tie up the extra length cables so they do not rest on the exhaust manifolds.
