Used Mercedes-Benz B-Class Brake Discs

The Mercedes-Benz B-Class W246 generation ran from 2011 to 2018, with a facelift in 2014, so a 2012 and a 2016 car are both W246s but sit either side of that facelift boundary. Disc dimensions can vary across a facelift, particularly if braking system upgrades were introduced mid-generation, so you should confirm the exact part numbers with the breaker against both registrations before buying. Never assume same-generation always means same disc.

Yes, engine size genuinely matters for brake disc fitment on the B-Class, because larger or more powerful engines are often paired with bigger brakes to manage the extra weight and performance. A B180 and a B220 4MATIC, for example, are likely to have different disc diameters front and rear. Always tell the breaker your exact engine code or registration so they can match the correct size.

Trim level alone — whether your car is a B-Class SE, Sport, or Urban — does not determine which brake discs you need; what matters is the generation and engine size. That said, if you are sourcing discs from a dismantled car, cosmetic differences between trims (such as alloy wheel styles) mean the physical appearance of components around the brakes may look different, but the disc itself should correspond to engine and axle specification rather than trim name. Always cross-reference your registration with the breaker to be sure.

Yes, all variants of the Mercedes-Benz B-Class — petrol, diesel, and the electric B-Class Electric Drive — use brake discs on at least the front axle, so this is a genuine part for this model regardless of drivetrain. Rear disc or drum configuration can vary by variant and market specification, so confirm with the breaker whether your specific car has rear discs or drums before ordering.

No — the W245 (2005 to 2011) and the W246 (2011 to 2018) are entirely different generations of the B-Class with different platforms, so brake discs are not interchangeable between them. Always make sure the breaker is supplying a disc from the same generation as your car, and also matching your engine size within that generation.

No — front and rear brake discs on the B-Class are different sizes and are not interchangeable with each other. When sourcing used discs, tell the breaker clearly whether you need nearside or offside (NS/OS), and whether you need front or rear, as these are distinct parts even from the same donor vehicle.