Mercedes W204 Front Door Lock Actuator Mechanism Front Right O/S A9077200400

The Mercedes W204 Front Right Door Lock Mechanism is an original part from the Locks and Latches category, designed for precise operation of the central locking system and the passenger side door handle. The used actuator ensures a factory fit for installation in a Mercedes, facilitating mounting and restoring proper door locking and unlocking functionality without altering the body structure.

Specifications and technical data

• SKU: rhd-A2128904067
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128904067
• Substitutable numbers: A2128904067, A 212 890 40 67
• Location on the vehicle: Front, Right
• Category: Exterior Locks & Lock Hardware

Vehicle Application and Placement

The presented lock mechanism is dedicated for installation on the front right door of a Mercedes C-Class W204 generation. Its placement on the passenger side means the component works in conjunction with the factory external door handle, the lock cylinder (if present), and the central locking system, responsible for:

• locking and unlocking the doors via remote control or the interior button,
• proper locking while driving,
• compatibility with the vehicle's factory safety systems.

Lock Mechanism Construction and Function

The front right door lock mechanism in a Mercedes W204 is a unit of mechanical and electrical components that transmits the signal from the central locking system to physically lock the door. Integrated within a single compact housing are:

• the mechanical part responsible for latch movement and interaction with the door handles,
• an electric actuator controlled by the comfort module,
• position sensors that inform the vehicle's electronics about the lock's status.

Thanks to this design, the lock ensures stable operation of the locking system and proper communication with the central locking and alarm system.

Benefits of Using an Original Mercedes Lock and Latch

Choosing an original mechanism from the Locks and Latches category for a Mercedes W204 allows you to maintain the parameters set by the vehicle manufacturer. The key advantages include:

• factory fit for the front right door – no need for mounting modifications,
• correct compatibility with the electrical system and comfort module,
• retention of remote and interior locking/unlocking functions,
• consistency with safety systems, such as door locking while driving.

As a result, the lock mechanism can be used as an effective service solution for issues with doors not closing properly, no response to the remote, or incorrect operation of the passenger side door handle.

Condition, Origin, and Service Application

The offered part is a used component, sourced from a dismantled Mercedes vehicle. This choice allows for an economical repair of the locking system while maintaining the original lock and latch construction. The mechanism is particularly suitable for situations where:

• the lock has stopped responding to the central locking signal,
• the front right door does not lock or unlock correctly,
• a complete actuator with mechanism replacement is necessary, rather than just individual components.

Using an original Mercedes W204 lock minimizes the risk of compatibility issues that can arise with aftermarket parts of uncertain origin.

Other Mercedes Locks and Latches and Guide Materials

If you are looking for other Mercedes locks and latches, check out the Mercedes locks and latches available in our store to find the right part for your specific model and body version.

When planning comprehensive vehicle maintenance, it's also worth paying attention to the cooling system – especially during the summer season. Practical tips on selecting used components can be found in the article Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings, which will help optimize operating costs while maintaining vehicle reliability.