Cheap Mercedes-Benz B-Class Brake Light Switch

These are both W245 generation B-Class models (2005–2011 and 2011–2018 overlap point needs care here: the W245 ran 2005–2011, and the W246 replaced it from 2012 onwards), so a 2009 switch is W245 and a 2012 switch is W246 — they are different generations and the switches are unlikely to be interchangeable. Name the generation to your breaker (W245 or W246) and confirm against your registration before ordering.

Both are W246 generation models, which ran from 2012 to 2018 with a facelift in 2014, so there is a reasonable chance of compatibility across this range. However, whether the facelift introduced any changes to the brake pedal assembly or switch specification is something you should confirm with the breaker against your exact registration rather than assume.

Yes, every variant of the Mercedes-Benz B-Class has a brake light switch — it is a standard component fitted to all petrol and diesel versions of both the W245 (2005–2011) and W246 (2012–2018) generations. The switch typically sits on the brake pedal bracket and tells the brake lights and other systems when the pedal is pressed.

For the B-Class, the brake light switch is generally consistent across engine variants within the same generation, as it is part of the pedal assembly rather than the drivetrain. That said, it is always worth confirming with the breaker against your registration, as minor specification differences between engine variants cannot be entirely ruled out.

Trim level does not affect brake light switch fitment on the B-Class — SE, Sport, Urban, and AMG Line all share the same brake pedal assembly within a given generation. The generation (W245 or W246) is what matters, so focus on that when speaking to a breaker rather than the trim name.

The W245 (2005–2011) and W246 (2012–2018) are distinct generations with different body structures and pedal box designs, so the switches are not expected to be interchangeable. Confirm this boundary with your breaker and always verify against your specific registration before purchasing a used part.