Used Mercedes-Benz GLS Central Locking Motor

The Mercedes-Benz GLS has been produced in two main generations: the first generation (X166) ran from 2016 to 2019, and the second generation (X167) launched in 2020 onwards. Central locking motors are generally generation-specific due to changes in door architecture and wiring, so a motor from the X166 is unlikely to be a straight swap into an X167. If you are looking at a part that spans that 2019–2020 boundary, confirm compatibility with the breaker against your registration before buying.

Trim level does not affect whether a central locking motor fits — the mechanisms inside the door are the same across standard, AMG Line, and other trim variants within the same generation. You may find cosmetic differences in how the door cards are dressed, but the motor unit itself is interchangeable across trims. Confirm the generation and body variant with the breaker against your registration to be sure.

Yes, the GLS does use individual central locking motors (also called door lock actuators) fitted within each door, including the tailgate. Each motor drives the locking mechanism for that door as part of the overall central locking system. If you are having trouble with a single door not locking or unlocking, a failed actuator motor on that specific door is a very common cause.

Yes, this matters — door lock actuators are typically handed (nearside or offside) and are not always interchangeable between doors, as the mounting orientation and rod linkage geometry can differ. When sourcing from a breaker, specify which door you need (NS front, OS front, NS rear, OS rear, or tailgate) to make sure you get the right unit. Always confirm this with the breaker against your exact registration.

The GLE and GLS share platform architecture across certain generations, and in some cases door lock actuators can cross over between models, but this is not guaranteed as door dimensions and linkage setups can differ. This is exactly the kind of cross-model question to route to the breaker — give them both your registration and the donor vehicle's details so they can check the part numbers against each other before you commit.

The X166 GLS ran from 2016 to 2019 and did not receive a substantial mid-cycle facelift in the way that changes door architecture, so central locking motors from within the X166 range are generally likely to be compatible with one another. That said, minor running changes can occur across a production run, so confirm the part number with the breaker against your specific registration before purchasing to be safe.