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Suspected oil leak and water leak?

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Old Jan 26, 2024 | 11:10 AM
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2010 c250 cgi
Suspected oil leak and water leak?

Hi guys.

Have noticed parts of under the car with a possible oil leak. Car is a 2010 c250 cgi.

Had it serviced recently, was told subframe and brake lines are corroded so currently speaking to mercedes to try and replace subframe under goodwill.

Mechanic cleaned any old oil off of the bottom of the engine and has told me to drive it for a bit and get back to him. The leak returned. Gonna take it back to him soon but thought maybe someone here would know possibly.

Also. Driver side undertray, roughly middle of the car there is a water leak? Anyone know what may cause this? Have attached a photos. Thanks guys

Middle of car. Driver side under tray. Water leak?

Driver side exhaust. Was cleaned of oil last week

Driver side again.

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Old Jan 26, 2024 | 04:50 PM
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W204 2010 C300 4matic Sport M272
May want to inspect the oil filter housing. I don't have that engine but I believe the oil filter housing is on the left rear of the engine. I replaced my oil filter housing gaskets due to oil leaking. Coolant also runs through it.

Also feel around under the vacuum pump to check for oil.

I found this photo from someone who had oil leaking from it.



Last edited by TimC300; Jan 26, 2024 at 04:59 PM.
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Old Jan 26, 2024 | 05:12 PM
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2010 c250 cgi
Thanks Tim. I will look into it and provide updates. Appreciate the help. In your picture above, this might be a silly question. But the thing on the left, with turbo written on it, what is that? I noticed some wet marks around the sealed area but didn't do further inspection yet.
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Old Jan 26, 2024 | 07:27 PM
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W204 2010 C300 4matic Sport M272
That is the oil filter housing. Unscrew the cap and the oil filter slides on in.





Its just a gasket sealing it to the engine that wears and fails resulting in leaks.



This is a different cap but your filter fits the same way.





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Old Jan 26, 2024 | 08:13 PM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Under the driver's seat inner rail there is a wiring harness pass through for a sensor connected to the fuel line. Not sure if you car has this, but you may want to check the carpet in the back for water/dampness. I will try to find my posting I did all about it.
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Old Jan 26, 2024 | 08:18 PM
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Here you go...

https://mbworld.org/forums/c-class-w...78-solved.html

https://mbworld.org/forums/c-class-w...er-s-side.html
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