Second Hand Mercedes-Benz B-Class Window Motor
Need a used Mercedes-Benz B-Class window motor? Request a free quote from UK vehicle dismantlers and compare offers direct.
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Buying a used Mercedes-Benz B-Class window motor: what matters
Fitment on a used window motor 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:
- Specify front/rear and left/right
Other used Mercedes-Benz B-Class parts
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- Used Mercedes-Benz B-Class Window Winder Motor
- Used Mercedes-Benz B-Class Door Lock Mechanism
- Used Mercedes-Benz B-Class Rear Cross Member
- Used Mercedes-Benz B-Class Horn
- Used Mercedes-Benz B-Class Sunroof
- Used Mercedes-Benz B-Class Alternator
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Used window motor for other Mercedes-Benz models
Fitment questions
Will a window motor from an older B-Class fit my newer one?
The Mercedes-Benz B-Class has two main generations: the W245 (2005–2011) and the W246 (2012–2018, with a facelift around 2015), and door mechanisms differ significantly between these generations so a W245 motor will not cross to a W246 or vice versa. Within the W246, motors from pre-facelift and post-facelift cars may differ, so confirm with the breaker against your registration before buying. Always tell the breaker your exact generation and which door you need.
Does it matter which side the window motor comes from — can I use a driver's side motor on the passenger side?
Yes, side absolutely matters — a motor from the OS (offside, driver's right) door will not fit the NS (nearside, passenger's left) door, or the other way around. When contacting a breaker, always specify NS or OS clearly alongside your generation. Getting this wrong means the part simply won't fit.
Does the window motor differ between the front and rear doors on a B-Class?
Yes, front and rear window motors are different units and are not interchangeable with each other. When requesting a quote, tell the breaker which door position you need — front NS, front OS, rear NS, or rear OS — as well as your generation. Mixing these up is a very common and costly mistake.
Does the trim level affect which window motor I need — for example, does it differ between SE, Sport, and AMG Line?
Trim level does not affect window motor fitment on the B-Class — an SE, Sport, or AMG Line car of the same generation uses the same motor for the same door position. The key variables are generation (W245 or W246), door position, and side (NS or OS), not the trim badge. You may find cosmetic differences around the door card, but the motor itself is the same.
I have a 2014 B-Class — will a motor from a 2016 car fit?
The W246 facelift arrived around 2015, meaning a 2014 car is pre-facelift and a 2016 car is post-facelift, so these sit either side of a production change. Whether the window motor crosses that boundary is something you should confirm with the breaker against both registrations, as internal mechanisms can be updated at facelifts even when the body looks similar. Give the breaker both registration numbers and let them verify compatibility directly.
Does the engine choice on my B-Class affect which window motor I need?
No — engine type has no bearing on window motor fitment whatsoever. Whether your B-Class is a petrol, diesel, or electric (B250e hybrid variant), the window motor is determined entirely by generation, door position, and side (NS or OS). You can safely ignore engine details when sourcing this part.