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How to Replace the Thermostat on a Mercedes-Benz B-Class

Model: Mercedes Classe B MK 1, W245 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011
Part: Thermostat

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Video tutorial

For this operation, it will be necessary to disconnect the battery terminals to protect any delicate circuits. Then, lift the bonnet.

Next, locate the air duct in the engine to remove it by simply releasing the clips that hold it in place. Now, identify the sensor in question, which is located at the point indicated in the video.

Disconnect the socket and remove the screws or bolts securing it to extract and replace it. Then, retrace the steps in reverse for reassembly.


Updated on 26 February 2026 by ScegliAuto


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