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Add coolant alert on 2012 ML350 BlueTec, any help?

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Add coolant alert on 2012 ML350 BlueTec, any help?

 
Old 10-01-2015, 11:01 AM
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C63s 2015 & ML350 Bluetec 2012
Add coolant alert on 2012 ML350 BlueTec, any help?

My 2012 ML350 Bluetec gave 2 alerts this month to add coolant. Anybody else having this problem? Does somebody knows where usually this car leaks coolant? I just want to be prepare before talking car to service. Thanks.
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Old 10-01-2015, 07:26 PM
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The coolant warning system is quite "sensitive" - and if you have genuine MB coolant you shouldn't be too concerned - and YES, have the dealer diagnose the potential "leak".

If a non-MB/non-ph-neutral coolant has been used in your MB - that can drive the sensor a bit crazy too.
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Old 10-02-2015, 09:22 AM
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Are you in fact losing coolant and are low? ...or is it a faulty sending unit reporting low coolant for no reason. On my E550 the sending unit went bad and they had to replace the plastic coolant overflow container with the sending unit attached.
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Old 10-02-2015, 11:14 AM
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Still losing coolant

Originally Posted by Barry45RPM View Post
Are you in fact losing coolant and are low? ...or is it a faulty sending unit reporting low coolant for no reason. On my E550 the sending unit went bad and they had to replace the plastic coolant overflow container with the sending unit attached.
The car is in fact losing coolant, I had to add it a few times now.

I am using MB original coolant fluid.

Thanks
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Old 10-02-2015, 02:56 PM
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Re coolant. ALWAYS use MB product. There are many different alloys/metals in engine system. Do not use any universal (works in any system) coolant.
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Old 10-02-2015, 06:14 PM
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ML350 BLUE TEC
Any coolant on the ground under the car in the mornings? Or any other time?
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Old 10-05-2015, 05:17 PM
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I had a leak from a hose connection right at the radiator. It was half way down the drivers side on the engine side. It was real difficult to even see the fitting. It dripped onto a panel on the bottom of vehicle so it never left anything on the garage floor. I'm guessing it would blow off as soon as I started driving. Used to add 32 oz of MB 50/50 coolant mix every two months when the vehicle asked nicely. Ended up reading it in that way
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Old 10-08-2015, 02:18 PM
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Thanks to all, car is at the dealership right now, I will post results.
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Old 07-23-2018, 07:45 PM
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Yeah, sure you will .....
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