Mercedes-Benz GLS Airbag Control Module Replacement Parts

Yes, every variant of the Mercedes-Benz GLS has an airbag control module (also called the SRS control unit) as standard — it manages the entire supplemental restraint system including airbags and seatbelt pretensioners across all engine and drivetrain options. Because it is a safety-critical component, professional fitting by a qualified technician is strongly recommended. Note also that if the module has been deployed in a collision it is single-use and must be replaced, not refurbished without specialist intervention.

The GLS moved from the first generation (X166, 2016–2019) to the fully redesigned second generation (X167, 2020 onwards) with a completely new platform and SRS architecture, so these two generations are not interchangeable. You should only be sourcing a module from the same generation as your car. Confirm exact compatibility against your registration with the breaker before purchasing.

Trim level can influence the SRS system on the GLS because higher trims such as AMG Line and the full AMG 63 variant may include additional airbags, different seat configurations, or pretensioner variants that interact with the module. For this reason you should not assume any module from the same generation will simply drop in regardless of trim. Always confirm the exact trim specification of the donor vehicle with the breaker against your own registration to make sure the SRS setup matches.

Engine type does not directly determine which airbag control module your GLS needs, as the SRS system is matched to the vehicle's generation, body structure, and trim specification rather than its powertrain. That said, you should still confirm compatibility with the breaker using your registration, because other trim or market differences that happen to correlate with certain engine choices could affect the module specification.

Airbag control modules are safety-critical parts and fitting one incorrectly can prevent the SRS system from functioning in a collision or, in rare cases, cause accidental deployment. Professional fitting and post-installation coding by a Mercedes-trained technician or specialist with the appropriate diagnostic equipment is strongly recommended. A used module will also typically need to be programmed to the receiving vehicle's VIN, so this is not a straightforward plug-and-play job.

Within the first-generation GLS (X166, 2016–2019) there were running production changes that could affect SRS system variants, and within the second generation (X167, 2020 onwards) the same caution applies. Even if a module comes from the same generation as your car, you should confirm the specific year and trim of the donor vehicle with the breaker and check it against your registration before buying, as minor production changes can affect compatibility.