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How to Replace the Water Pump on a Mercedes Class B W246

Model: Mercedes Classe B W246, MK 2 - Years 2011-2019
Part: Pump

Let's see how to replace the water pump on a Mercedes Class B W246: it is a hard-to-reach component and requires the removal of many parts: it is located at the bottom of the engine, behind the support; this is not a job for beginners. You will need to remove the radiator fan, the oil lines (inlet and return), the engine support, and the coolant pipes and ducts. After disassembling these, you must replace a large number of components: the water pump, of course, the gaskets for all oil and coolant connections, all bolts, and entire pipes that have undergone a design update. After installing the new pump, the reassembly process is equally meticulous; the cooling system must be filled, an accurate air bleed of the system performed, and check thoroughly for any leaks. In summary, this is not a job for hobbyists; it requires professional tools, extensive mechanical knowledge, and plenty of time.

Posted on 1 May 2026 by ScegliAuto

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