Are you pressing the button on the key fob to close the trunk of your Mercedes but it stays open? Your luxury vehicle has a power trunk – what a luxury it is to have one, but when the power trunk decides to go on the blink, it becomes a challenge! Let’s take a look at why your Mercedes power trunk may not close and what you can do about it.
How Does The Power Trunk Operate?
The power trunk in your Mercedes is a sophisticated mechanism made of electric motors, sensors, and control modules to ease the opening as well as closing of the trunk. The mechanism is triggered by simply pressing a button on the key fob, on the dashboard, or the trunk. It is a combination of elegance and innovation, and the purpose is to minimize your work when accessing the truck of your Mercedes. However, this system depends on many factors. If one part of it is not working well, then nothing works and you may find yourself with a stationary trunk.
Possible Reasons Why Your Mercedes’ Power Trunk Won’t Close
- Faulty Latch Mechanism: The latch is that part that fits and locks the trunk properly. If the trunk is dirty, worn out, or damaged in any way it may not close properly. There may be some dirt or rust accumulated in the latch which will make the situation seem much worse than it actually is.
- Obstructions in the Trunk: In some cases, it is wise to go for the most obvious answer. Pat down your car’s trunk for anything that may prevent the trunk from sealing well such as dirt or even an object wedged in the hinge. A minor barrier is enough to keep the trunk from closing properly.
- Sensor Issues: New models of Mercedes cars come with a system that is able to detect whether the trunk is properly shut. If these sensors are out of line or not properly working, they may send a wrong message that something is in the way of the trunk and will not close.
- Electrical Problems: Power trunks are dependent on electrical systems in their operational models. If the fuse has blown, the wiring has become damaged, or if any motor is failing, the trunk will not function properly. However, if you notice other electrical problems in your Mercedes then it could be a sign that there is a bigger issue with the electrical system.
Fixing Power Trunk Problems
- Realign or Replace Sensors: Misaligned sensors may need to be realigned or some may need to be replaced. A professional technician can easily identify that there is a problem with the sensor and he can fix it.
- Repair or Replace the Latch Mechanism: Sometimes the latch can simply be cleaned or lubricated but if this does not work then it means that it needs to be repaired or replaced. Power trunk failure is often a result of a faulty latch which is typically easy to address.
- Fix Wiring or Replace the Motor: Another thing that could pose a problem to the trunk of your Mercedes is electrical problems like damaged wires or a faulty motor. If the wiring is damaged, then the technicians can fix it and if the motor is a problem, then it can be replaced to make your trunk work again.
- Reprogram the System: Sometimes, the power trunk system of the car may require reprogramming of the car’s Electronic Control Unit (ECU) for it to function effectively. This is best handled by an experienced mechanic using special tools.
Visit a Professional Mechanic
If the problem is not resolved by these basic remedies, it would be wise to have the car checked by an expert mechanic who will easily diagnose the problem and make your power trunk efficient once again.
Let Motor Cars International Experts Help
Motor Cars International is 
a go-to repair shop located in Bridgewater, MA that deals with the repair and maintenance of luxury cars such as Mercedes-Benz. We also cater to drivers from Easton, Raynham, Norton, and Sharon. Our team of highly skilled technicians, together with the latest equipment and genuine parts, will give your car the attention it deserves.
Whether it’s just a small issue or a major electrical failure, we will have you back on the road in no time. We boast of excellent customer relations and communication and we ensure that our clients are fully informed about the repair needs and pricing. Call us now to schedule an appointment.
* Mercedes-Benz R 350 with an Open Trunk image credit goes to: Oksana Kuznetsova.