Mercedes R171 Door Lock Cylinder Barrel Catch Set A1718900667

Mercedes R171 Door Lock Cylinder Barrel Catch Set is a precision-engineered component from the Locks and latches category, designed for efficient locking and unlocking of doors in Mercedes vehicles. This used component ensures factory-standard mechanical fitment while providing an economical and technically sound solution for repairing the vehicle's locking system.

Specifications and technical data

• SKU: RHD-A1718900667
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1718900667
• Substitutable numbers: A1718900667, A 171 890 06 67
• Category: Exterior Locks & Lock Hardware

Purpose and technical function

The presented Mercedes R171 Door Lock Cylinder Barrel Catch Set is designed as a part of the mechanical door security system in Mercedes R171 series models. It is responsible for correctly transferring the key movement to the locking mechanism, which ensures reliable door locking and unlocking, including in emergency situations where the central locking system may not be functioning properly.

Thanks to its design compliant with manufacturer standards, the lock cylinder works with the factory door mechanism, maintaining proper operating geometry and appropriate resistance when turning the key. This solution is particularly important for repairs following mechanical damage or wear of the original lock.

Benefits of using an original Mercedes door lock

Using an original component from the Locks and latches category to replace a worn or damaged part allows for maintaining the integrity of the entire vehicle locking system. In practice, this means:

• maintaining proper interaction between the lock cylinder, door mechanism, and handle,
• stable operation during repeated opening and closing cycles,
• reduced risk of jamming and key-turning issues,
• easier diagnostics of potential future faults.

The used component helps reduce repair costs while maintaining the original design, which is particularly important for users who value compliance with the vehicle's factory specifications.

Component condition and installation aspects

The offered door lock is sourced from disassembly and is classified as a used part, which in practice means it retains its original geometry and compatibility with factory door mounts. Before installation, it is recommended to perform a standard inspection of the mechanism and, if necessary, lubricate moving parts to ensure smooth operation in the long term.

Replacing the lock cylinder is a standard service operation performed when experiencing key issues, mechanism jamming, or after mechanical damage to the door. Using an original solution facilitates installation and eliminates the need for additional modifications.

Application in the vehicle security system

A functional door lock has a direct impact on daily operating comfort and vehicle security. In the case of Mercedes R171 models, it acts as a mechanical security feature complementing the central locking and electronic systems. Replacing a worn cylinder with an original component restores proper system operation, which is particularly important for vehicles used on a daily basis.

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as locking mechanisms, cylinders, or catches, check out the available parts in the Mercedes Locks and latches category.

Additional information and selection support

Selecting the appropriate door lock for a specific body version and model year requires attention to compatibility with the factory locking system. It is worth using original solutions to avoid problems with fitment and excessive mechanism wear in the future.

If you are interested in a broader context regarding the use of components from disassembly for modifications and repairs, the following article describing a practical approach to selecting used parts may be helpful: The best used parts for tuning your car.