2013 ML350 BT - When to change the coolant?

Apr 7, 2020 | 04:05 PM

Potrice

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Joined: Nov 2015

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From: Ottawa, Ontario

2013 ML350 Bluetec, 1966 Ford Mustang Convertible (sold)

2013 ML350 BT - When to change the coolant?

I have checked the manual and it doesn't specify when to change the coolant? My suv is now sitting at 205k km and the coolant was never changed. When or should I change it? I changed my transmission, transfer case, and front/rear axle fluids so far. Thanks!

Apr 12, 2020 | 12:30 AM

geniushanbiao

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2012 ML350 Bluetec, 2015 GL350 Bluetec

The MY13 maintenance booklet says replace coolant at 150k miles. After the first replacement you should be replacing it every 60k miles. Have your oil cooler seals been replaced before? When replacing oil cooler seal the coolant will be drained anyways.

Apr 12, 2020 | 07:11 AM

Potrice

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Senior Member

Joined: Nov 2015

Posts: 272

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From: Ottawa, Ontario

2013 ML350 Bluetec, 1966 Ford Mustang Convertible (sold)

Quote:

Originally Posted by geniushanbiao

Thanks for the reply. It seems that I’m due soon and I’ll replace it myself. If it’s similar to other vehicles with a drain plug, it should be a fairly easy job. Any idea how much litres goes in there? I think it’s the blue antifreeze in mine.

Regarding the oil cooler seals, I bought the vehicle at 60k km and I don’t think they’ve ever been changed... no oil leaks so far!

Apr 12, 2020 | 10:22 AM

geniushanbiao

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Joined: Apr 2012

Posts: 356

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2012 ML350 Bluetec, 2015 GL350 Bluetec

Quote:

Originally Posted by Potrice

I would suggest you to wait until the oil cooler seal goes and then do the work together. I bet it won't be long. My 2015 GL350BTC has the viton seal failed at 75k miles. But it's up to you. Replacing coolant is such an easy thing to do though and it's pretty cheap. You can find the coolant capacity in your user's manual. I replaced my coolant in my 2012 ML350BTC and it took about 2 gallons. I know I was not getting everything out of the system as there's still something left in the engine unless can find the drain bolt. The dealer parts dept guy told me usually a coolant change takes 2 gallon of concentrate (which is 4 gallon 50/50 mix), where 1 gallon is for washing and the other for filling. Make sure you buy some distilled or DI water from local food store and mix with the coolant 1:1. Don't use tap water.

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