Mercedes-Benz W124 - How to replace the thermostat and test it

Maintenance and keeping your Mercedes Benz in good shape.
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I am Hervé Collette and I will teach you in this repair video how to replace the thermostat on a Mercedes-Benz W124 300D.
Hope this will teach you something with this DIY tutorial so you won´t have to take your car to the workshop, save some money and keep your Mercedes on the road.