C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Probably a stupid question

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Old Jan 2, 2016 | 09:58 PM
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2003 C230 Coupe , 2009 BMW 328i
Probably a stupid question

Hey guys, just picked up a 2003 C230 Kompressor for the wife.

All seems good, no issues but got it home and noticed a vacuum line unplugged from a part of the engine that I don't know what is.

Can one of you let me know a) what the round brass colored component is just to the front left off the side of the engine and b) if the vacuum hose that forms a hard 'U' into place being unplugged would cause any issues?

Image attached - Yellow arrow is the line that was pulled out. What is the component circled in red?

Thanks guys!
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Old Jan 3, 2016 | 12:47 AM
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2005 C230K(sold), Mk7 Jetta
Here is the info: https://mbworld.org/forums/c-class-w...hose-m271.html

If the vacuum hose is unplugged from anything you will have a vacuum leak first thing.
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Old Jan 3, 2016 | 12:58 AM
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2003 C230 Coupe , 2009 BMW 328i
Thanks

Thanks for the information VVF. Much appreciated!
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Old Jan 3, 2016 | 12:59 AM
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its the secondary air injection diverter valve. just plug it back in so you dont get a check engine light otherwise no issues will be noticed since its only for reducing emissions.
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Old Jan 3, 2016 | 01:02 AM
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the vacuum hose that was unplugged is after the switchover valve so it wouldnt cause a vacuum leak unless its actually running the secondary air test which is on cold start and before the engine is in closed loop so there wont be any driveability issues anyways.
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Old Jan 3, 2016 | 01:10 AM
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2003 C230 Coupe , 2009 BMW 328i
Thanks Rocman, appreciated.
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