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Whining noise a week after oil change

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Old Jun 7, 2016 | 10:43 PM
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C230
Whining noise a week after oil change

Hello. I started noticing a whining sound a week after an oil change on my 2012 c230, was wondering if anyone night know what it could be?
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Old Jun 9, 2016 | 10:18 AM
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bone stock E55 AMG
moved to W204 forum...
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Old Jun 9, 2016 | 10:24 AM
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2013 C250 Sport
Does it do it while in park?

Does pitch change with engine RPM?

Does the pitch change with speed?
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Old Jun 10, 2016 | 01:33 AM
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2008 C350 Eurocharged
More importantly, who did the oil change? Have you verified the oil is at the correct level on the dipstick? What kind of oil was used?
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