Is your Mercedes parking sensors not working properly? Mercedes-Benz cars are famous for incorporating sophisticated technologies, including the parking sensor system. These sensors aid in parking and assist in identifying any objects in the vehicle’s path to ensure that no crashes occur. If your Mercedes parking sensors are faulty, you will realize that the distance indications are incorrect, there are beeping sounds that do not correspond to the situation, or the parking sensors do not work when reversing.
A bad parking sensor system poses a danger to your car, increasing the chances of scratching, damaging, or even crashing into other vehicles. Below are some probable causes of the Mercedes parking sensors and how they can be replaced.
Understanding How Mercedes Parking Sensors Work
The Mercedes parking sensors work by emitting ultrasonic waves to feel the surrounding environment of your car. When an object is close, the system notifies the driver using sound alarms or by displaying messages on the dashboard. The nearer to the obstacle, the higher the pitch of the beeping sound. These sensors are installed in the front and rear bumpers and interact with other Mercedes safety features such as the Park Assist.
What Causes Mercedes Parking Sensors to Fail?
Mercedes parking sensors can get damaged for several reasons, such as dirt, moisture, and even physical damage. The sensors are prone to getting obscured by road debris and dirt, which hinders their functionality in detecting obstacles. Another common cause of the problem is internal corrosion, caused by the water seeping from the car wash or during heavy rains. Sometimes, the wiring may be damaged, hindering the sensors from sending signals. Malfunctions in the parking assist system can also cause wrong measurements or complete malfunction. Also, even minor shocks or an impact on the car’s bumper can cause misalignment of the sensors or even crack them.
How to Replace Defective Mercedes Parking Sensors
- Check Which One is Defective: Before replacing the faulty parking sensor, it is good to find out which one is not working. To begin with, use the diagnostic scanner to check for codes associated with the parking assist system. You can also test the sensors individually by activating the parking system and listening for a clicking sound—the operational sensor makes a weak clicking sound, while the faulty one makes no sound at all.
- Locate the Parking Sensors: Mercedes parking sensors are usually placed in the front and rear bumper. You must take off the bumper or grille to reach them, depending on the sensor’s location. This may involve taking out screws, clips, or fasteners that hold the bumper in place. It is important to be extra cautious when disconnecting the connectors on the wiring harness in order not to cause any harm to them.
- Replace the Defective Sensor: When the faulty sensor is within reach, disconnect its wiring connector. Carefully remove the sensor by applying pressure in a twisting motion or pulling it out from the housing. If the sensor is stuck, use a plastic trim removal tool to avoid scratching the bumper or other components.
- Replace the New Sensor: Place the new parking sensor correctly into the appropriate position in the car. Reconnect the wiring harness and ensure that all the connections are tightly fixed. Before putting back the bumper, check whether the sensor is working as it should.
- Reassemble and Test the System: Reinstall the bumper or grille and ensure that all the clips and screws are properly clicked or screwed in. After assembling the components, power the vehicle and check the parking assist system. If the error code remains an issue, then a diagnostic scanner is recommended to reset the system.
Hagan’s Motor Pool Is The Reliable Service Center For Mercedes Repairs In Rochester
When a parking sensor is not functioning optimally, 
it will be challenging to park the car, and the chances of an accident will be high. If your Mercedes-Benz is beeping, unresponsive, or showing an error, it is time to clean or replace the sensor. Hagan’s Motor Pool is a company that offers Mercedes repair and maintenance services. We have experienced and skilled technicians in Rochester, NH, that can repair your parking sensor problems promptly and effectively. The other nearby towns we serve include Berwick, Dover, Alton, and Barrington in New Hampshire. Are you in need of a Mercedes parking sensor replacement? Call us now!
* White Mercedes-Benz C-Class Car image credit goes to: Andrii Baidak.