Mercedes W212 Trunk Lid Tailgate Door Lifter Motor Control Unit A2128201842

The Mercedes W212 Tailgate Actuator Rear is a precise component from the Window Regulators and Motors group, responsible for the controlled closing of the rear tailgate on the right side. Designed for stable operation in demanding conditions, it ensures repeatable tailgate movement and enhances the comfort of daily use of the trunk in the Mercedes E-Class W212.

Specifications and technical data

• SKU: A2128201842
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128201842
• Substitutable numbers: A2128201842, A 212 820 18 42, BG
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and Function in the Tailgate System

The tailgate actuator operates in the rear right part of the body, responsible for the controlled closing movement. This element works with the lock mechanism and the vehicle's electrical system to:

• stabilize the tailgate closing process,
• limit mechanical stress on hinges and the lock,
• ensure repeatable, predictable tailgate movement in daily operation.

Proper actuator selection maintains the correct tailgate geometry, which translates to trunk sealing and proper gasket fit.

Construction and Mounting Parameters

The actuator is designed as a component that works with the factory tailgate system in the Mercedes E-Class W212 generation. Its placement on the rear right side of the vehicle allows for direct replication of the original mounting path, without the need for body or bracket modifications.

Key mounting features include:

• dedicated position at the rear of the vehicle on the passenger side,
• compatibility with factory mounting and tailgate guidance,
• adaptation for cooperation with the original control system.

This configuration simplifies servicing and reduces replacement time, which is important for both workshops and individual users.

Benefits of Using an Original Mercedes Actuator

Choosing a tailgate actuator specifically designed for the Mercedes W212 maintains consistency with the vehicle's factory construction. A properly selected component ensures:

• correct cooperation with the body electronics – no need for adaptation or installation modifications,
• stable tailgate operation characteristics – predictable closing and reduction of unwanted vibrations,
• maintenance of factory trunk operation comfort parameters,
• reduced risk of accelerated wear of the lock and hinges.

This component group is particularly important in vehicles used intensively, where frequent opening and closing of the trunk requires maintaining appropriate tailgate movement dynamics.

Condition, Origin, and Service Application

The offered actuator comes from the Mercedes line and is classified in the Window Regulators and Motors category, confirming its belonging to the group of actuators responsible for movable body components. The product is used, which in service practice often represents a favorable compromise between cost and maintaining original mounting specifications.

The actuator is suitable as a replacement in case of factory component failure, as well as for comprehensive rear body repairs where restoring full tailgate functionality is required.

Mercedes Window Regulators and Motors – Part Selection

If you are looking for other Mercedes Window Regulators and Motors compatible with specific models of this brand, use the dedicated category: Mercedes Window Regulators and Motors. This will facilitate quick comparison of available body actuators and selection of components for a cohesive repair.

Service Knowledge and Fault Prevention

When planning repairs for body and drive systems, it is also worth considering potential weak points of drive units in other popular models. For comparison and a better understanding of operating costs, you can refer to the guide: BMW E90 Faulty Engines – A Practical Guide to Problematic Units. This will allow for better budgeting of service costs and informed decisions regarding the purchase of used components.