S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Low coolant error please help

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Old Sep 20, 2021 | 11:24 AM
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Midnight s600's Avatar
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2007 Mercedes Benz s600 (w221)
Low coolant error please help

Howdy ok so new issue with (w221) s600 I woke up getting ready for school went and started my car and I got a low coolant light? With no visible leaks or smells suggesting a leak? Then I turned the car off checked to the best of my knowledge with this vehicle (very minimal) the level of coolant and I was wondering if these motors are known to burn coolant a bit since they are rather big and if so how do
i check and top off the fluid any tips or ideas are appreciated thank
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Old Sep 20, 2021 | 03:51 PM
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vettebk's Avatar
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2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, 2017 Mustang GT, 2023 300C, and a 2019 Lincoln
My 2007 S600 also had a slow drip in April of 2019. Mine turned out to be a hairline crack in the radiator. New radiator took care of it. No problems since.

I have heard dozens of stories about guys trying to save money on a radiator by using epoxy on hairline cracks. Don't even go there. Just replace the silly thing. The dumbest story I ever heard was a guy who tried to JB Weld a radiator hairline crack and it leaked out, of course, overheating his V12 and ruining his engine.
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Old Sep 20, 2021 | 06:03 PM
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2007 S600
Yeah, I had coolant going "somewhere" for quite a while. Would light up like clockwork every 300 miles or so. Drove me nuts. Ended up being the radiator. Price on it wasn't that bad iirc, around $350 or so?
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