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How to Replace the Coolant Temperature Sensor on a Mercedes A-Class

Model: Mercedes Classe A W169 - Years: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Part: Engine coolant temperature sensor

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Video tutorial

In this video, see the procedure for removing and replacing the coolant temperature sensor on a Mercedes A-Class. First, open the hood and disconnect the coolant hose from the thermostat, allowing the fluid to drain into a container.

Next, remove the mounting screws for the temperature sensor and disconnect the electrical connectors. Now, replace the old sensor with the new one, using the original part.

Finally, reassemble everything by following the reverse procedure!


Updated on 8 May 2026 by ScegliAuto


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by ScegliAuto

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