Mercedes-Benz B-Class Seat Belt Replacement Parts

This is a key question because the current W246 B-Class ran from 2011 to 2018 with a facelift in 2014, and seat belt assemblies can differ across that facelift boundary — particularly pretensioner variants and anchorage points. A 2012 belt is pre-facelift and a 2015 belt is post-facelift, so you should confirm with the breaker whether the specific assembly from their vehicle matches yours against your registration before buying. Side (NS or OS) and seating position must also match exactly. Because seat belts with pretensioners are safety-critical single-use components, professional fitting is strongly recommended.

No — the W245 (2005–2011) and W246 (2011–2018) are entirely different generations with different body structures, so seat belt assemblies are not interchangeable between them. Always match the belt to the correct generation, and confirm the exact part against your registration with the breaker. Side (NS or OS) must also be specified when requesting a quote.

For most W246 trim levels — including SE, Sport, AMG Line and Urban — the seat belt anchor points and reel mechanisms are generally the same, though higher trims may have belts with different webbing colour or finishes to suit the interior. The fitment-critical factors are generation, door count, and side (NS or OS), not trim level, but you should still describe your trim to the breaker so they can match any cosmetic details. Confirm the exact assembly against your registration before purchasing.

You must specify nearside (NS, passenger side) or offside (OS, driver side) as the belt mechanisms and pretensioners are handed and will not swap between sides. Front and rear position matters too, so tell the breaker exactly which seat the belt is for. Confirm all details against your registration to make sure the breaker's donor vehicle matches yours.

Seat belts with pretensioners are safety-critical components — they are single-use devices that must be replaced after deployment in a collision, and a used belt should only be sourced from a vehicle where the pretensioner has never fired. You should confirm with the breaker that the belt comes from an undamaged, non-deployed vehicle, and check pretensioner variant compatibility against your registration as variants can differ. Professional fitting by a qualified technician is strongly recommended for any seat belt replacement.

Both 2013 and 2016 fall within the W246 generation (2011–2018), but the facelift occurred in 2014, placing these two cars on opposite sides of that boundary. Seat belt assemblies can vary across the facelift — particularly in pretensioner specification — so fitment cannot be assumed and you should confirm compatibility with the breaker using both registrations. Side (NS or OS) and seating position must also match, and professional fitting is advised given the safety-critical nature of the part.