Mercedes W124 Rear Window Tailgate Wiper Motor Drive Unit A1248201242

Mercedes W124 Rear Window Tailgate Wiper Motor Drive Unit is a precision component from the Wiper motors and linkages group, designed for operating the rear window in W124 series models. It enables stable, uniform wiper operation, which translates into safe visibility in difficult weather conditions and comfort during daily use.

Specifications and technical data

• SKU: A1248201242
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1248201242
• Substitutable numbers: A1248201242, A 124 820 12 42, 0390201506, 0 390 201 506
• Location on the vehicle: Rear
• Category: Wiper Linkages, Transmissions & Motors

Purpose and function in the wiper system

The rear wiper motor is responsible for driving the wiper arm on the rear window, ensuring smooth operating movement and return to the rest position. In the case of the Mercedes W124, this component is structurally matched to the bodywork and the geometry of the rear window, which allows for effective removal of water, mud, and debris from the driver's field of vision.

Thanks to the correct selection regarding its placement on the vehicle (rear), the motor works with the factory electrical installation and the drive transmission mechanism, limiting the risk of improper operation or system overload.

Compatibility and selection by numbers

The offered motor is a component dedicated to Mercedes vehicles from the W124 series, which makes it easy to match to a specific body version. It is worth basing the selection of parts on the OEM number and available interchangeable numbers – this allows you to verify compatibility with the specific car configuration and avoid assembly problems.

In case of doubts during selection, it is helpful to compare the component you have with the offered product in terms of connector type, mounting orientation, and the way it interacts with the wiper linkage. Such an approach minimizes the risk of mismatch and shortens repair time.

Performance characteristics and application benefits

The rear wiper motor in the Mercedes W124 operates in demanding conditions – it is exposed to moisture, temperature changes, and body vibrations. Using an original solution from the same design group ensures:

• stable wiper operation at various driving speeds,
• correct range of arm movement on the rear window,
• consistency with the factory control system,
• maintenance of functionality over a long period of use.

As a used component, the motor is a cost-effective solution while maintaining proper operating parameters. It is a practical choice for maintenance repairs when the priority is system efficiency and compliance with the vehicle's design.

Placement on the vehicle and assembly aspects

The motor is intended for installation in the rear part of the vehicle, in the mounting zone of the tailgate or rear window wiper (depending on the body version). Proper placement on the vehicle facilitates integration with the existing linkage mechanism and electrical installation, which shortens service time.

During assembly, it is recommended to pay attention to:

• correct setting of the arm's rest position,
• tightness of grommets and seals at the point of passage through the bodywork,
• condition of electrical connectors and power cables.

Such an approach allows maintaining the efficiency of the wiper system and limiting the risk of repeated service intervention.

Mercedes wiper motors and linkages – expansion and service

If you are planning a comprehensive repair or upgrade of the visibility zone and wiper system in your Mercedes and need other elements from the same group, such as drives, gears, or linkages working with the arms, check the available parts in the Mercedes wiper motors and linkages category.

Safety of choosing a used component

Choosing a used wiper motor is a reasonable compromise between cost and functionality, especially in the case of vehicles such as the Mercedes W124, where maintaining the original design counts. A properly selected component allows you to restore full efficiency of the rear wiper without the need to invest in a new sub-assembly.

If you want to better understand how to safely choose used drive and accessory components based on OEM numbers and selection procedures, the expert guide will be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths. You will find practical tips there that can also be applied when selecting other vehicle system components.