Used Mercedes-Benz B-Class Fuel Tank

Both years sit within the second-generation B-Class (W246), which ran from 2011 to 2018 with a facelift in 2014, so they share the same basic platform. Whether the tank itself crosses that 2014 facelift boundary without issue is something you should confirm with the breaker against your registration, as mounting points or ancillary connections can change mid-production. Supply your engine code from your V5 or a VIN check — that's the single most useful detail for the breaker to match against their stock.

Yes, fuel type matters most — a diesel tank and a petrol tank are not the same part, so make sure the donor car shares your fuel type. Gearbox type can also affect tank shape or sender unit configuration on some applications, so confirm this with the breaker. Your engine code, shown on your V5, covers both of these factors in one go and is the clearest way to ensure a match.

The badge alone doesn't determine fitment — what matters is the engine code underneath, since different engine codes can sometimes sit behind the same badge across different model years. A B180 and a B200 fitted with the same engine code and fuel type will generally use the same tank, but if they carry different engine codes the breaker will need to verify compatibility. Always quote your engine code rather than just the badge when requesting a quote.

The W245 ran from 2005 to 2011 and the W246 from 2011 to 2018 — these are entirely separate generations on different platforms, so the fuel tanks are not interchangeable. You must source a tank from the correct generation for your car, and the breaker will need your registration and engine code to confirm the right unit. Don't attempt to cross generations on a structural mechanical component like this.

Trim level does not affect fuel tank fitment on the B-Class — Sport, SE, and AMG Line are specification packages that change interior, wheels, and cosmetic details, not the fuel system. The tank is determined by engine code, fuel type, and year within the generation, so a tank from an SE donor will fit an AMG Line car of the same engine and fuel type. The breaker may supply a tank with different sender unit brackets or straps depending on the donor car, so confirm those ancillary details with them before buying.

The most important detail is your engine code, which you'll find on your V5 logbook or via a VIN check — it tells the breaker your exact fuel type and engine variant in one reference. Also have your registration number, the model year, and your gearbox type (manual or automatic) ready, as these all help narrow down the correct tank. The breaker will confirm ancillary fitment details such as mounting hardware and sender units against your specific car, so don't assume all tanks within the same year are identical.