What are the causes of Mercedes-Benz electric tailgate failure?
2 Answers
Mercedes-Benz electric tailgate failure can be caused by issues with the electric tailgate button, remote key button/chip failure, activation of the anti-pinch function when closing the tailgate, or lock mechanism failure. Electric tailgate button failure: When the vehicle is unlocked, if the electric tailgate button malfunctions, it sends incorrect signals to the control module. The solution is to open the tailgate for inspection and repair the button if necessary. Remote key button/chip failure: If the tailgate does not open automatically when the key is placed outside the vehicle's sensing range, it usually indicates a problem with the remote key button or chip. The solution is to replace the components in the remote key and perform a computer re-matching service. Activation of anti-pinch function when closing the tailgate: If the tailgate automatically opens during closing, it is usually due to foreign objects or insufficient lubrication causing increased resistance, which triggers the anti-pinch function. The solution is to apply lubricant. Lock mechanism failure: If the tailgate automatically opens without being properly locked, it generally indicates a lock mechanism failure. The solution is to replace the lock mechanism.
The electric tailgate on my Mercedes had an issue recently, and it took a long time to figure out the cause. The most common problem is wiring faults—frequent opening and closing of the trunk can wear or break the wires, especially in winter when the rubber seals harden and are more likely to crush the wiring. Another issue is sensor failure; if the sensors on the rear bumper get dirty or blocked, they stop working. Last time, a patch of mud stuck to my car’s rear caused the tailgate to fail to open. There’s also the problem of aging hydraulic struts—after four or five years, the oil seals may leak, making it impossible to lift the tailgate. Short circuits in the control module are another risk; high-pressure water jets during car washes can seep into the seals and fry the chips. Lastly, don’t overlook voltage instability—once, I forgot to turn off my dashcam, and the battery drained so much that even the tailgate wouldn’t open. If you notice a fault, address it promptly. Don’t force the button, or you might burn out the motor.
