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Help with doing a smoke test

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Old May 24, 2026 | 05:44 PM
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2005 Mercedes C230 Kompressor
Help with doing a smoke test

Hi, newbie here, have been trying to catch up on repairs to my car, not the first owner but I have had my vehicle since 2017, it is a 2005 c230 kompressor, I’m just wondering if anyone has a picture of where I am supposed to put a smoke machine to test vacuum hoses for any leaks. I’ve been searching the web with no luck for this car model information with pictures for reference anyway…. Thank you in advance for any help.
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Old May 24, 2026 | 06:00 PM
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C230K
Smoke should be introduced where the MAF clips into the inlet pipe.
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Old Jun 4, 2026 | 05:39 PM
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2005 Mercedes C230 Kompressor
Originally Posted by smgak
Smoke should be introduced where the MAF clips into the inlet pipe.
sorry by any chance would you happen to have a picture or know where I could see exactly where this is located? I’m not too car savvy. 😅
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Old Jun 4, 2026 | 10:39 PM
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C230K
I don't have a photo but here's the best one I could find.

https://mbworld.org/forums/attachmen...ent-mafout.jpg


see the MAF in the middle? You want to introduce smoke to the elbow pipe (located at the left of the photo)

got the photo from this post.
https://mbworld.org/forums/c-class-w...ml#post2378234

the entire thread is probably worth reading if you're not familiar with your way around your car.

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Old Jun 4, 2026 | 10:58 PM
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W204 2010 C300 4matic Sport M272
Are there any issues with the car or you just checking things?

I dont have that engine but have seen a tsb on one of the engine vent hoses.

Here is a link to view it: https://lemon-manuals.la/Mercedes%20...oses/Overview/


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Old Jun 6, 2026 | 04:56 PM
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2005 Mercedes C230 Kompressor
Originally Posted by TimC300
Are there any issues with the car or you just checking things?

I dont have that engine but have seen a tsb on one of the engine vent hoses.

Here is a link to view it: https://lemon-manuals.la/Mercedes%20...oses/Overview/

I ran an obd scan on it due to the check engine light being on, and it gave me 2 codes, P0171 and P0453 so I was wanting to do the smoke test to see if I had a vacuum leak or some sort of hose leak to atleast figure out that part, I did also purchase a fuel pressure sensor but I know that is a bit of work to do as well
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