Used Mercedes-Benz B-Class Washer Motor

The Mercedes-Benz B-Class runs across two main generations: the first-generation W245 (2005–2011) and the second-generation W246 (2012–2018, with a facelift around 2015). Washer motors are generally not interchangeable between these two generations as the bodywork, screen geometry, and pump mounting differ. Within the same generation, fitment is much more likely, but always confirm with the breaker against your registration to be sure.

Both of these fall within the second-generation W246, which ran from 2012 to 2018, with a facelift introduced around 2015. Parts within the same generation often interchange, but the 2014 sits pre-facelift and the 2016 is post-facelift, so there is a potential boundary here that could affect fitment. Confirm with the breaker against your exact registration before buying to avoid a wasted journey.

Yes, the Mercedes-Benz B-Class is a front-wheel-drive hatchback and is fitted with a windscreen washer system as standard, which includes a washer pump motor housed in the washer fluid reservoir. Both the front and rear washer systems (where a rear washer is fitted) are served by pump motors, so this is a genuine part on this vehicle. When sourcing a used one, let the breaker know whether you need the front or rear pump, as these can be separate units.

Trim level does not affect washer motor fitment on the B-Class — the washer system is consistent across trim grades such as SE, Sport, and AMG Line within the same generation. You may find that higher trims have additional features like heated washers, so it is worth mentioning your trim to the breaker so they can match the correct spec. The underlying pump motor is the same across the range within a generation, but flagging this avoids any minor differences in connector or reservoir design.

Not necessarily — on many B-Class models the front and rear washer pumps are separate motors that fit into the same reservoir but are distinct units, often with different flow rates or connector configurations. When contacting a breaker, specify clearly whether you need the front or rear pump to avoid being sent the wrong one. If you are unsure which has failed, a local garage can usually confirm this quickly before you order.

No — the engine variant does not affect which washer motor you need, as the washer system is the same regardless of whether your B-Class is a petrol, diesel, or hybrid model. What matters is the generation (W245 or W246) and whether you need the front or rear pump. Give the breaker your registration and specify front or rear, and that should be enough for them to find the right part.