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Noise when I start engine

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Old Jun 8, 2021 | 01:25 AM
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nairaf's Avatar
nairaf
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mercedes
Noise when I start engine
Hello everyone,

When I start the engine I hear this noise for 2-5 seconds than it goes away. What problem it can be ?
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Old Jun 8, 2021 | 08:42 AM
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antiguangenius
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From: NYC
2008 S550 4Matic, 2007 GL450, 2008 C300, 2018 GLE63 AMG
audio is poor can hear anything properly
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Old Jun 8, 2021 | 09:11 AM
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W204 C220CDI 2011
You need to record this with the bonnet/hood open and standing in front.
What engine is this ?
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Old Jun 8, 2021 | 02:49 PM
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From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
Cannot hear the noise at all.
If its a low frequency knocking noise at startup, mine went away on a C350 after I changed over to Shell Ultra 5W-40 oil.
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