Mercedes-Benz Power Hatch Lift Support

What is a power hatch lift support?

 A power hatch lift support, also called electric tailgate strut, power rear hatch lift support, or power tailgate lift support, is a device that helps to open and close the rear hatch or liftgate of a vehicle. It uses a hydraulic or electric system to assist in lifting the weight of the hatch or liftgate, making it easier to open and close.

A power tailgate lift support can be found on vehicles with a power liftgate or power rear hatch. When the driver activates the power liftgate button or uses the key fob to open the hatch, the lift support system engages and assists in lifting the weight of the hatch. This is especially useful for people who may have difficulty lifting heavy objects or for those who want the convenience of being able to open the hatch with the touch of a button.

Electric tailgate struts are typically made up of a hydraulic or electric motor, a liftgate control module, and lift cylinders or struts. These components work together to provide the lifting force needed to open and close the hatch. They are an important component of the vehicle's safety system, as they can prevent the hatch from falling unexpectedly and causing injury or damage.

Electric tailgate strut working principle

As a type of power hatch lift support mechanism, electric tailgate struts use an electric motor to lift and hold the tailgate in place.

• Power source: Electric tailgate struts are powered by electricity from the vehicle's battery or electrical system.
• Control module: A control module or computer manages the operation of the electric rear hatch lift. This module may be located in the vehicle's central computer or integrated into the tailgate itself.
• Motor: An electric motor drives the lift mechanism of the tailgate struts. When activated, the motor rotates a gear or pulley that moves a piston or hydraulic cylinder, causing the tailgate to lift.
• Sensors: Sensors may be included to detect when the tailgate is fully open or closed, and to prevent the tailgate from opening or closing if an obstruction is detected.
• Wiring: Wiring connects the various components of the electric tailgate struts, allowing the control module to communicate with the motor and sensors.

How to replace power hatchback lift supports?

Replacing power hatchback lift supports is a relatively simple task that can be completed quickly with just a few basic tools.

To begin, ensure that you’ve purchased the correct replacement struts specific to your vehicle model. Once confirmed, the next step is to safely secure the hatchback or tailgate in an open position. This can be done by using a prop rod, a sturdy piece of wood, or by asking someone to hold it open for you.

After the hatch is safely supported, you can proceed to remove the old lift supports. Use tools like a flathead screwdriver or a small pry bar to release the clips or fasteners holding them in place. Be sure to keep one hand on the hatch while removing the struts to prevent it from dropping unexpectedly.

Next, align the new power lift supports with the mounting points on both the hatch and the vehicle frame. Gently push or snap the retaining clips into position to lock them securely.

Once installed, slowly raise and lower the hatchback a few times to check if the new supports are working properly. If you notice any stiffness, misalignment, or difficulty in movement, double-check the installation points and make any necessary adjustments. A smooth and balanced operation means the replacement was successful.