S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Heater Core?

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Old Jul 22, 2024 | 12:37 AM
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From: Charlotte
2015 Mercedes-Benz S550 4MATIC, 2021 GLC300 4MATIC Coupe and 2006 S500 RWD
Heater Core?

Hey I have a coolant leak. I see coolant coming out of the rear floor vents and it stained my carpet. I think it is leaking from the heater core. Any got any detailed instructions on replacing the thing. There is one YouTube video with an Asian guy replacing an evaporator core but there is no key details or information on the tools you need. If anyone accomplished this feat before I would appreciate a guide because I don’t want to damage anything in the process.
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Old Jul 23, 2024 | 07:47 PM
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I think it’s much more likely your reed valve clogged and your blower motor filled with water that traveled under passenger side floor
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Old Jul 23, 2024 | 07:59 PM
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2015 Mercedes-Benz S550 4MATIC, 2021 GLC300 4MATIC Coupe and 2006 S500 RWD
Originally Posted by tusabes
I think it’s much more likely your reed valve clogged and your blower motor filled with water that traveled under passenger side floor
It is actually coolant. It stained my carpet blue and I got beige interior 😭. I put bars leak to slow it down currently it stopped for the time being. The heat still works good so it did its job. I used this stop leak plenty times before so I doubt it going to harm anything. I just got my heater core so I’m ready to tackle the job
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