Mercedes W221 Door Check Brake Strap Rear Left Right A2217300516

Mercedes W221 Door Check Brake Strap Rear Left Right is an original component from the Doors and door panels group, designed for the rear doors of the luxury S-Class sedan. The door check stabilizes the movement of the door leaf, ensuring controlled opening and closing while protecting the hinges and door skin from excessive stress. This is a practical solution for users who expect repeatable, predictable door operation from their Mercedes in daily use.

Specifications and technical data

• SKU: A2217300516-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217300516
• Substitutable numbers: A2217300516, A 221 730 05 16, A2217300016, A 221 730 00 16
• Location on the vehicle: Rear, Right, Left
• Category: Doors & Door Skins

Purpose and function in the door system

The rear door check brake strap is responsible for mechanically positioning the door leaf in several stable positions. This prevents the doors from closing automatically on inclines and from opening abruptly due to wind. The component works on both the left and right rear sides, which facilitates part selection when repairing both doors simultaneously.

In the S-Class design, this type of solution is particularly important for the comfort of rear-seat passengers – the smooth, controlled operation of the door check translates into convenience when entering and exiting, as well as reduced stress on the hinges and door panels.

Compatibility and body fitment

The offered door check has been designed specifically for the W221 body, which means full compatibility with the door geometry, mounting points, and hinge travel range. The original design ensures:

• proper cooperation with factory hinges and door panels,
• appropriately selected braking force in individual opening positions,
• maintenance of the factory door operation characteristics on both the left and right rear sides.

As a result, after replacing the door check, the doors behave according to the manufacturer's specifications, without the need for additional modifications or adjustments.

Characteristics of the used component

The door check comes from dismantling, which allows for maintaining the original design specifications intended by the manufacturer. For many users, this is a beneficial solution because the component retains its factory operating parameters while serving as an economical alternative to a new part. A used component of this type works well for:

• post-accident repairs of rear doors,
• eliminating play and clicking sounds during opening,
• restoring uniform operation of both rear doors in the vehicle.

Benefits of using an original door check

Using an original door check in a Mercedes W221 allows for maintaining the consistency of the entire door system. Precise positioning of the door leaf reduces the risk of paint and body damage during uncontrolled opening and limits the loads transferred to the hinges. This is particularly important in the heavy, well-equipped doors of the S-Class, where the weight of the door leaf is significantly greater than in compact cars.

Additionally, the stable operation of the braking mechanism influences the perceived quality of vehicle use – the doors open with predictable resistance, without jerks or unwanted noises, which is important for both the driver and rear-seat passengers.

Mercedes doors and door panels – expansion and repairs

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other components from the same group, such as skins, reinforcements, or additional mounting elements, check out the available parts in the Mercedes doors and door panels category.

Why it is worth choosing original used components

In the case of such structurally complex models as the Mercedes S-Class, using original, used components allows for maintaining the technical consistency of the entire body. A well-chosen rear door check brake strap helps maintain factory fitment and door operating characteristics, which is important for both comfort and body durability. If you want to learn more about the advantages of using parts from dismantling in premium cars, it is worth reading our guide: Used parts – key benefits and practical tips for selection.