Used Mercedes-Benz GLS Ignition Barrel

No — the Mercedes-Benz GLS (sold in the UK from around 2016 onwards, covering both the X166-based first generation and the X167 second generation from 2019) does not use a traditional ignition barrel. All GLS models use a keyless push-button start system with a proximity key, so there is no physical barrel for the key to turn. If you are having starting or key-recognition issues, the part you are most likely looking for is the EIS (Electronic Ignition Switch) module, the steering column lock unit, or possibly the key fob itself.

Because the GLS has no conventional ignition barrel, the fault is almost certainly elsewhere — the most common culprits are the EIS (Electronic Ignition Switch) unit mounted in the dash, the antenna ring that reads the key, or the key fob battery. A Mercedes-specialist or auto-electrician can read the fault codes to pinpoint which component has failed before you source a used part. When buying a used EIS from a breaker, give them your registration so they can match the correct unit, as these modules are generation-specific.

There is no ignition barrel on any GLS variant to swap in — the model has always used keyless entry and push-button start across both its generations (X166, introduced around 2016, and the revised X167, from 2019). Fitting a barrel-style ignition is not a straightforward like-for-like swap and is not something a breaker would supply as a direct replacement part for this vehicle. If a breaker is listing an 'ignition barrel' for a GLS, confirm exactly what component they mean before purchasing.

For the electronic ignition and starting system components, trim level does not affect which parts were fitted — the push-button start and EIS setup is consistent across SE, AMG Line, and Grand Edition variants. What may differ is the exact key fob style or any cosmetic surround around the start button, but the functional ignition electronics should interchange within the same generation. Always confirm the specific part number with the breaker against your registration to be certain.

Listings labelled 'ignition barrel' for a GLS are most likely referring to the EIS (Electronic Ignition Switch) module, the steering column lock assembly, or occasionally the start-button housing — sellers sometimes use the old-fashioned term loosely. It is worth contacting the seller directly to confirm exactly what the part is before buying, as these are quite different components with different functions. Your registration will help a reputable breaker identify the correct unit for your generation of GLS.