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2001 ML320 & 2003 SL500
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Discussion Starter #1
I am at a 100K and am changing the plugs and the wires. I can't seem to find bosch 7422 at my local auto store, but noticed they have a large selection of NGK.

Anyone know what the NGK equivalent plug is for the bosch 7422.
 

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1999 ML320
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24,029 Posts
I am at a 100K and am changing the plugs and the wires. I can't seem to find bosch 7422 at my local auto store, but noticed they have a large selection of NGK.

Anyone know what the NGK equivalent plug is for the bosch 7422.
For something changed so infrequently, I would stick to the OEM's.
 

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1999 E55, 2001 E320, 1990 560 SEC, 2004 ML350, 2001 ML55, 1995 S500, 1998 SL500, 2010 E550 Sport zoo
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7,035 Posts

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'01-E320 & 02-ST2
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(12) Bosch replacements for like $68.50 delivered:

Mercedes Benz E320 BOSCH 12 pcs Spark Plug Set - Plugs - eBay (item 120645462967 end time Dec-09-10 14:22:16 PST)

My school I don't replace spark plug wires unless I have too - and the 17mm spark plug boot tool/wrench really saves my time and knuckles on this job for like $30.

Keep the beat !
How come you're so married to fleabay? Autohausaz.com has them for under $54 delivered...Your Parts Search Returned 1 Part(s)


OP, if you really want NGK, you want the 2647, which like the OEM plug is dual-platinum. The 7090 (sometimes suggested on the forum) is only single platinum, which at the least means it won't last as long. Those do not seem to affect driveability, though.

The 2647 is a pretty costly plug, though; perhaps that's why some tout the 7090. OTOH, install the dual platinum and you know it's good for 100K miles, case closed from my perspective.
 

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1999 E55, 2001 E320, 1990 560 SEC, 2004 ML350, 2001 ML55, 1995 S500, 1998 SL500, 2010 E550 Sport zoo
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7,035 Posts
After my first wife - never remarried - sorry for the misdirection, I should have checked deeper.
 

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1999 ML320 (SOLD), 2011 BMW X5
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157 Posts
Not to rehash old conversations, but I read here and elsewhere that duals, quads etc are not all that good. They sound good in concept but the execution falls short is what I hear.
 

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2000 ML430, 2000 C280
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920 Posts
The OEM plug is single tipped. You should NOT use dual or quad tipped plugs!

DelJ



..OP, if you really want NGK, you want the 2647, which like the OEM plug is dual-platinum. The 7090 (sometimes suggested on the forum) is only single platinum, which at the least means it won't last as long. ...
 
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