2017 GLS550 Coolant Leak

[rpaoness]

This looks like the right part:
https://www.partsgeek.com/c4523km-merce ... n5EALw_wcB

Comes up as no fitment data?
https://www.mercedesbenzpartsshop.com/o ... 2782001000

[rpaoness]

I also think removal of the fitting may require me to pull the belly covers and I'm not sure about frame-horn-to-side of turbo clearance. Would be good if I can find a generic molded hose that I could cut out the 3/8-1/2 adapter I need from with the total 3" or so of hose.

[kevm14]

viewtopic.php?p=23869#p23869

viewtopic.php?p=23911#p23911

Yes 3/8" heater hose. That is the thread where I replaced all of the plastic turbo cooling lines with rubber heater hose.

You'll probably have to remove the thermostat which may break in the water pump. And you may have to remove the oil filter adapter in which case you need a new gasket. But looking at my pics maybe not.

[rpaoness]

I don’t see any plastic other than the tee fitting.

[rpaoness]

Since I couldn’t find a 3/8-1/2” hose piece I replaced the tee with a plumbing fitting and hose barbs of the right sizes. Working for now and no leaks so far.

I’ll have to try to get pns if that one I found isn’t it. With just that hose in the link I guess I’d be all set until something else leaks

[rpaoness]

I'm surprised Rockauto lists them:
https://www.rockauto.com/en/partsearch/ ... 2782002551

[kevm14]

Apparently those are different than mine.

[rpaoness]

Since I'm probably going to use it for just the hose anyhow (and the tee fitting casting looks uncannily like the stock one), I ordered Dorman off Amazon for $40.

https://www.amazon.com/dp/B09JHRBSLT?re ... asin_title

[rpaoness]

A pic I took mainly for pulleys, but the 1/2" NPT tee is visible.

[rpaoness]

Managed to break off the vent line fitting from the center of the intake valley to the vent line on top of the engine.

PN 2782031217.

I put a short piece of hose a couple clamps for now, but I'd like to swap for the correct quick connect.

Found it on ECS for $17.45, claims OE supplier on the "image", but it's just Rein. Still about 1/2 Rockauto's price for the same.

https://www.ecstuning.com/b-rein-parts/ ... 31217~ren/