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SL/R231: When does auto transmission fluid need changing

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Old 04-05-2024, 03:24 AM
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Originally Posted by JettaRed
RockAuto also seems to be the cheapest.

https://www.rockauto.com/?mfr=NGK&partnum=96427
Are genuine ones from Mercedes in the US much more expensive than rock auto ones?
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Old 04-05-2024, 07:52 AM
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Originally Posted by ToeKneee
Are genuine ones from Mercedes in the US much more expensive than rock auto ones?
Depends on where you buy. The genuine plugs are cheaper on Pelican Parts, but not elsewhere.


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Old 04-05-2024, 08:26 AM
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For comparison, 8 plugs from Mercedes Newcastle (UK) are £90.84.
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Old 04-05-2024, 09:25 AM
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Originally Posted by ToeKneee
For comparison, 8 plugs from Mercedes Newcastle (UK) are £90.84.
So, that's a little cheaper than here. I'm sure getting them from the dealer here will be $50 EACH!!!
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Old 04-05-2024, 01:41 PM
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Originally Posted by JettaRed
Due north of the spark plugs (i.e., 12 o'clock position).
OK. I think I got it. Look at each bank and the 12 o'clock position, I.e. the injector is directly above each spark plug?
Last edited by rmorin49; 04-05-2024 at 01:45 PM.
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Old 04-05-2024, 04:50 PM
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Originally Posted by rmorin49
OK. I think I got it. Look at each bank and the 12 o'clock position, I.e. the injector is directly above each spark plug?
Correct. Watch this video.


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Old 04-05-2024, 05:51 PM
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Originally Posted by JettaRed
Nice video but I'm tired just watching it.
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Old 04-05-2024, 05:59 PM
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Originally Posted by rmorin49
Nice video but I'm tired just watching it.
Much simpler on our engines. That's the benefit of a V6 over a V8. Plus, the guy wanted to be exact with his indexing. As long as you are within +/- 45° of the fuel injector, you're good.
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