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Fluctuating RPM while on the gas

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Old May 20, 2012 | 11:57 PM
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2008 C300
Cool Fluctuating RPM while on the gas
Hey guys
I have a slight problem, my RPM is going up and down maybe 100 up and down while I am on the gas. Does that mean I have a vacuum leak?
I changed my air filter and exhaust recently, is there anyway to check?
Thank you!
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Old May 21, 2012 | 12:18 AM
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From: five oh two
2008 W204 Sport
You should take the air filter back out and make sure it is properly seated in the air box and that the air box is properly seated
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Old May 21, 2012 | 12:45 AM
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I just lookd at it. There is one corner that does not sit flush but it's like that for both sides..is that normal then?
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Old May 21, 2012 | 01:03 AM
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From: five oh two
2008 W204 Sport
It should sit flush, filter, and air box should all be seated properly
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Old May 21, 2012 | 01:35 AM
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can a leaking exhaust lead to this as well?
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Old May 21, 2012 | 01:41 AM
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From: five oh two
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No, if you have your old filters, slave them in real quick and see what happens
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