Mercedes C CLK Class W203 W209 Rear Left N/S Seat Fold Down Lock A2039200372

Mercedes C CLK Class W203 W209 Rear Left N/S Seat Fold Down Lock is an original component from the Seats and benches group, designed for the rear left seat section in C-Class W203 generation models. This precisely selected lock ensures proper latching of the backrest, structural stability of the seat, and safe use of the rear bench during daily operation.

Specifications and technical data

• SKU: A2039200372
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2039200372
• Substitutable numbers: A2039200372, A 203 920 03 72, EM
• Location on the vehicle: Rear, Left
• Category: Seats and Sofas

Purpose and function of the backrest lock

The presented lock is responsible for mechanically locking the rear left seat backrest, which is crucial for passenger safety and the stability of luggage transported behind the rear bench. The component operates in the rear cabin area, on the left side, working in conjunction with the seat structure and the backrest folding mechanism.

A properly selected lock eliminates play, unwanted noises, and the risk of the backrest unlocking spontaneously while driving. This is particularly important when the rear bench is frequently folded and unfolded, e.g., in vehicles used for family purposes or cargo transport.

Compatibility with Mercedes W203

The component has been designed specifically for the seat structure in the Mercedes C-Class W203 generation, ensuring it fits geometrically to the rear left backrest without the need for modifications. The appropriate mounting points and mechanism kinematics are adapted to the factory seat frame and the standard folding system.

The original origin from the Mercedes group ensures compliance with factory tolerances, which translates into a proper fit with the guides, catches, and upholstery of the rear bench.

Characteristics of the used component

The product comes from dismantling, which allows for maintaining factory build quality while optimizing repair costs. The lock is a complete, used sub-assembly intended for reinstallation in a correctly matched W203 model.

Choosing an original, used backrest lock is a beneficial solution wherever compliance with factory specifications, proper operation of the folding mechanism, and maintaining the consistency of the entire seat and bench system are important.

Benefits of installation in the rear bench area

Replacing a faulty lock with a functional component from the same construction group allows you to:

• restore proper latching of the rear left seat backrest,
• increase the safety of rear-seat passengers,
• reduce noise resulting from backrest play while driving,
• maintain full functionality of folding and locking the rear bench.

Thanks to this, the interior of the Mercedes W203 remains ergonomic, and the rear part of the cabin retains its functional utility in both passenger and cargo modes.

Expansion and modernization of the Mercedes seating area

If you are planning a comprehensive repair or modernization of the seating area in your Mercedes and need other components from the same group, such as backrests, seat cushions, or complete benches, check the available parts in the Mercedes Seats and benches category.

If you are considering broader improvements to cabin comfort, it is worth checking out our guide, which describes how branded parts from dismantling affect the ergonomics and value of the vehicle – details can be found in the article Interior metamorphosis: how branded seats from dismantling improve comfort and vehicle value.