Need a used Mercedes-Benz B-Class window regulator? Request a free quote from UK vehicle dismantlers and compare offers direct.
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Fitment on a used window regulator varies by vehicle, so a bit of detail goes a long way. Our request form covers what breakers need to know, so every quote you get back is for the correct part:
The B-Class has run across two main generations: the W245 (first generation, 2005–2011) and the W246 (second generation, 2012–2018, with a facelift in 2014). These generations use different bodyshells and door structures, so regulators are not shared between them. Always tell your breaker which generation or W-number applies to your car, and confirm against your registration.
Both years fall within the W246 second generation (2012–2018), but your 2015 car sits after the 2014 facelift, which is a known boundary within that generation. Whether the regulator crosses that facelift boundary is something you should confirm with the breaker against your registration, as door internals can be updated at a refresh. Give the breaker both the donor year and your registration to be safe.
Yes, absolutely — window regulators are side-specific and will only fit the door they are designed for. NS is nearside (passenger side, left in the UK), and OS is offside (driver side, right in the UK). Always specify which side you need when requesting a quote from a breaker.
No, trim level does not affect window regulator fitment on the B-Class — the door structure and regulator mechanism are the same across SE, Sport, Urban, and AMG Line variants within the same generation. You may find cosmetic differences in door cards or glass tints between trims, but the regulator itself is interchangeable. Just make sure the generation and side match.
No — the W245 and W246 are entirely different generations with different door structures, so their window regulators are not interchangeable. Always source a regulator from the correct generation for your car. Confirm the exact fit with the breaker using your registration.
No — engine choice, whether petrol, diesel, or hybrid, has no bearing on window regulator fitment. What matters is the generation (W245 or W246), the door side (NS or OS), and where your car sits relative to the 2014 W246 facelift. Focus on those details when getting quotes from breakers.