GL Class (X166) 2013-2015 after facelift became GLS (X166)

Overheating help!

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Old May 5, 2023 | 04:34 PM
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Benz1978's Avatar
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GL 450
Overheating help!

When driven gl 450, overheats temperature needle barley jumps to 120, pull over the road and turn off truck, Engine fan working no leaking of coolant. Top of reservoir tank top hose is shaking into reservoir, let the truck cool down open up reservoir tank hot steam comes up and water starts shooting out. What could be making truck do this, 3rd time I burped it 2 twice already and added 2 gallons of antifreeze.

Res tank top hose shakes and upon opening tank steam comes out when overheated from hose location inside res tank.

Last edited by Benz1978; May 5, 2023 at 04:41 PM.
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Old May 5, 2023 | 10:48 PM
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
Water pump isn't pumping, thermostat isn't opening, or head gasket is toast.
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Old May 5, 2023 | 10:48 PM
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From: New Orleans
2014 GL450, 1992 W140 300SD, 1993 W140 300SE, 1987 E30 Convertible
Thermostat or reservoir cap
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Old Jul 8, 2023 | 08:49 PM
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GL 450
Crack inlet coolant hose on firewall to heater core, 15$ part easy fix. Truck is no longer overheating
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