Mercedes C118 W177 Door Lock Left N/S Actuator Latch Catch A0997201702

Left Door Lock Mercedes C118 / W177 is an original part from the locks and latches category, designed for precise integration with the factory locking system in modern Mercedes models. This used, fully functional mechanism ensures correct operation of the actuator, latches, and door position sensors, leading to secure closing and stable communication with the vehicle's electronics.

Specifications and technical data

• SKU: rhd-A0997201702
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997201702
• Substitutable numbers: A0997201702, A 099 720 17 02
• Location on the vehicle: Left
• Category: Exterior Locks & Lock Hardware

Vehicle Application and Placement

The presented door lock is dedicated for installation on the left side of the body, which is crucial for proper alignment with the door panel, handle, and window regulator. The mechanism's design has been specifically developed for the door architecture in Mercedes C118 and W177 models, ensuring:

• correct positioning relative to the pillar and seals,
• maintaining appropriate closing force for the door leaf,
• compatibility with factory linkages and wiring harness.

Technical Construction and Actuator Function

The door lock combines a mechanical latch with an electric actuator within a single housing. This configuration allows for smooth operation of the central locking, locking, and unlocking of the doors via remote control or an interior button. The internal gear and latch system is optimized for:

• stable transfer of torque from the actuator to the lock tongue,
• reduction of working clearances, minimizing unwanted noises,
• proper cooperation with sensors that inform control units about the door's status.

This ensures the locking system remains consistent with the factory comfort and safety logic in Mercedes vehicles, including functions such as open door indication and driving lock.

Benefits of Using an Original Mercedes Door Lock

Using an original door lock for the Mercedes C118 / W177 offers tangible operational benefits. This component has been designed for the specific door geometry and actuator parameters, resulting in:

• secure locking – doors close with predictable force, eliminating the need for makeshift adjustments,
• electronics compatibility – body control modules correctly interpret signals from the lock, minimizing the risk of dashboard errors,
• stable central locking operation – no conflicts with the factory software and electrical system.

A used, original lock is often a more predictable solution than aftermarket replacements of inconsistent quality, especially in vehicles equipped with advanced body electronics.

Condition, Verification, and Selection Based on Technical Data

This part is a used component, offered as a fully functional door lock for reinstallation. Before being listed, it was verified for the operation of the locking mechanism and the actuator's response to control signals. This ensures the user receives a component ready for installation without requiring additional mechanical interventions.

It is advisable to base the selection of the lock on the vehicle's technical data and manufacturer markings to avoid compatibility issues. If needed, comparing the housing design, electrical connector positions, and mounting shapes with your existing part can be helpful.

Other Mercedes Locks and Latches, and Technical Knowledge

If you are looking for other locks and latches for Mercedes, check out the Mercedes locks and latches available in our assortment to select the appropriate mechanism for your specific model and body side.

For those interested in the broader context of using original used parts in premium cars, we recommend an article describing selection procedures based on manufacturer markings, the impact of component quality on system durability, and practical examples from the aftermarket: how original used parts affect the precision and durability of premium cars.