Second Hand Mercedes-Benz B-Class Fuse Box

The B-Class runs across two main generations — the W245 (2005–2011) and the W246 (2012–2018, with a facelift around 2015) — and the fuse box is not interchangeable between these two generations as the electrical architecture is fundamentally different. Within the W245 generation, a fuse box from a 2006 car may well match a 2009 car, and similarly within the W246, earlier and later examples are more likely to be compatible, though the 2015 facelift can introduce changes worth checking. Always confirm with the breaker against your registration to be sure the part matches your specific car.

This question crosses the W246 facelift boundary of around 2015, which is exactly the kind of situation where you need to be cautious — Mercedes updated a number of electrical systems at the facelift and the fuse box configuration may have changed. A pre-facelift 2014 W246 fuse box is not guaranteed to be a straight swap into a post-facelift 2016 car. Confirm with the breaker against both registrations before purchasing.

Yes, all variants of the Mercedes-Benz B-Class — across both the W245 (2005–2011) and W246 (2012–2018) generations — are fitted with a fuse box as standard. The B-Class is a front-wheel-drive car throughout its production, and the fuse box is a standard component regardless of engine or drivetrain. There is typically more than one fuse box location on these cars (often one in the engine bay and one in the passenger compartment), so make sure you and the breaker are clear on which one you need.

Engine choice — whether petrol, diesel, or the electric drive variant on the W246 — can affect the fuse box specification because different powertrains have different electrical demands and circuits. This means a fuse box from a diesel B-Class may not be correct for a petrol car of the same year, and the electric drive (B 250 e) variant in particular is likely to have a different setup entirely. Always confirm with the breaker using your exact registration so they can match the right part.

Trim level — whether your car is a SE, Sport, AMG Line, or Urban on the W246 for example — does not typically affect the core fuse box specification, as these are cosmetic and equipment variations rather than changes to the fundamental electrical architecture. However, options fitted to higher trims such as panoramic roof, advanced driver assistance systems, or premium audio can add circuits, so there is a possibility the fuse box varies by options rather than trim name itself. Give the breaker your full registration so they can check the exact build of your car rather than just the trim name.

Yes, the Mercedes B-Class typically has more than one fuse box — commonly one in the engine compartment and a separate unit inside the cabin, often in the passenger footwell area or behind a panel. These are entirely different parts and are not interchangeable with each other, so it is important to identify exactly which fuse box has failed before approaching a breaker. Describe the location clearly when requesting a quote to make sure you receive the correct unit for your car.