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Coolant levels full but warning light says low - thoughts?

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Old 05-05-2024, 03:51 PM
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Coolant levels full but warning light says low - thoughts?
Coolant levels visually full but warning light says low - thoughts?

Runs at 190/200*.

Bad sensor? Easy swap?

Thanks.
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Old 05-05-2024, 08:42 PM
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2016 S65, 2014 SLK55 (Previous 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
Sensor or reservoir, start with sensor but it's likely the reservoir.
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Old 05-05-2024, 10:08 PM
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Originally Posted by VII
Sensor or reservoir, start with sensor but it's likely the reservoir.
Reservoir as in leak? Visually both are at full level.

With two reservoirs, one is for turbos and one the motor? I should know this.

Thanks
Last edited by Donnymac; 05-05-2024 at 10:11 PM.
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Old 05-05-2024, 10:10 PM
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The reservoir contains the answer to how that sensor that does not get wet can tell the level.
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Old 05-05-2024, 10:16 PM
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Originally Posted by VII
The reservoir contains the answer to how that sensor that does not get wet can tell the level.
Got it.

Hope you survived all the rain and ducked the twisters.
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Old 05-06-2024, 10:44 PM
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Thanks, luckily it has not been too bad over here but the season is still young.
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Old 05-06-2024, 11:38 PM
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Had this issue and my reservoir had a slight leak. Replaced and the message is gone. Also, be sure to check your intercooler reservoir (in the middle under the engine cover) once in a while... recently learned that there is not a sensor for that tank.
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Old 05-07-2024, 12:01 AM
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Originally Posted by S550e
Had this issue and my reservoir had a slight leak. Replaced and the message is gone. Also, be sure to check your intercooler reservoir (in the middle under the engine cover) once in a while... recently learned that there is not a sensor for that tank.
Thank you sir. Will check maņana.
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