Mercedes ML W164 W251 Tailgate Lock Rear Trunk Latch Mechanism A1647400300

Tailgate Lock Mechanism Catch for Mercedes ML W164 W251 Rear Trunk Latch is an original part from the Locks and Latches group, designed for the rear of the body. It ensures secure locking of the trunk lid, stable closing, and correct interaction with the factory opening and closing mechanism in Mercedes ML and R-Class vehicles.

Specifications and technical data

• SKU: A1647400300-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647400300
• Substitutable numbers: A1647400300, A 164 740 03 00, A1647400335, A 164 740 03 35
• Location on the vehicle: Rear
• Part type: Tailgate Lock
• Category: Exterior Locks & Lock Hardware

Vehicle Application and Function

The presented tailgate lock is a component mounted in the rear area of the vehicle body, responsible for mechanically locking the trunk lid. It works with the factory striker and the vehicle's electrical system, enabling secure lid closure while driving and convenient opening for everyday use.

Thanks to its precise design, tailored for Mercedes ML W164 and W251 models, the mechanism maintains the correct operating geometry, which reduces the risk of play, incomplete lid closure, or unwanted noises during operation.

Mechanism Construction and Technical Features

The tailgate lock mechanism is based on a system of pawls and levers, connected to the factory linkage or opening actuator. The design intended for the rear of the vehicle ensures:

• stable locking of the trunk lid in the closed position,
• smooth release of the striker during opening,
• proper guidance of the handle or actuator throughout its operating range,
• maintenance of the lid's factory position relative to the body.

Proper fitment to the specific body generation helps maintain the seal of the rear of the vehicle and correct cooperation with the lid's seals and hinges.

Benefits of Using an Original Tailgate Lock

Using an original tailgate lock in a Mercedes ML W164 or W251 allows for the preservation of the mechanism's original operating parameters. This solution is particularly beneficial when the existing lock causes closing problems, requires excessive force to close, or generates unwanted sounds.

The main advantages include:

• secure locking of the tailgate – reducing the risk of accidental opening while driving,
• compatibility with the factory body construction – no need for modifications to mounting points or element adjustments,
• maintaining the correct lid position relative to the body, which contributes to sealing and vibration reduction,
• compatibility with the original opening and closing control system.

Practical Service Application

This part is suitable for both routine replacement of a worn-out lock and for post-accident repairs of the rear body section. Lock replacement is a standard service procedure that restores the proper function of the tailgate without interfering with other components.

Due to its belonging to the Locks and Latches group, this part is a crucial component of the vehicle's locking system, impacting user comfort and the security of cargo in the luggage compartment.

Condition and Origin

The offered tailgate lock is a used part, removed from a Mercedes vehicle. It is a pre-owned component, allowing for an economical repair while maintaining original construction and fitment for the specific model. This type of solution is often chosen in professional workshops where compliance with factory assembly standards is important.

If you are planning a comprehensive repair or upgrade of the tailgate closing area in your Mercedes and need other parts from the same group, such as strikers, lock cylinders, or soft-close mechanisms, check the available parts in the Mercedes Locks and Latches category.

If you are considering a broader range of work using used parts and want to be better prepared to choose the right components, it is worth reading the guide on purchasing used parts and common mistakes during modifications – you can find it in the article Buying Used Car Parts • Common Mistakes When Choosing Tuning Parts.