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How to Program a MERCEDES Truck Key Our parts department is here to assist you, whether you need to replace batteries or your key no more works. Be aware that replacement keys should be ordered and synchronized in the dealership in person. This is to ensure the safety and security of your vehicle. This service can only be requested by you or a person authorized to request it. Keys Some people have claimed that you can reprogram your Mercedes key. This is not the case. Once the key is paired, it will not work with any other car. The key has a particular design in its metal beam and the Mercedes system scans for this and only recognizes that particular key. A new key for the Mercedes truck has a different design and will not work with the system. The dealer must obtain from Mercedes an additional key that is compatible with your vehicle. They do not keep keys in stock at the parts department. You'll need the original title or registration and a driver's license, identity card, or passport to show when you pick up the key. This helps confirm that the person is the owner and not someone trying to steal the vehicle. If you wish to have a representative or delegate pick the keys up for you, you will require all the documentation above and an authorization letter signed and signed by the owner. truck key programmer authorized representative or delegates must also bring the vehicle into the dealership in order to get keys. Contact the dealer if you have any questions. They are happy to assist. They will tell you whether they already have the key or whether Mercedes needs to order a new key that is compatible. Remotes In certain MERCEDES models the remote key comes with touchscreen that shows virtual buttons. When the remote key is pressed the infrared signals are transmitted to devices that control them. A graphical interface program can be used to program the screen. The “buttons”, which appear on the screen, are actually images of electronic circuit components. These include resistors, capacitors inductors, potentiometers diodes, transistors integrated circuits and switches. If you put your keys in the boot, it can be difficult to open the truck without damaging the door or the Mercedes-Benz lock cylinder. Try using a rope that has an a slip knot to secure the lock cylinder and then pull it open, but this isn't a foolproof method. You may need to test it multiple times before calling a locksmith or roadside assistance service to help you open the truck without damaging it. The lower case has a panel that is removed to store the batteries. The panel is a light brown color, with white writing to indicate the type of batteries that should be used (UM-4/AAA). It also includes a Plus sign and Minus sign to indicate the direction the battery spring coils should be positioned when installing the batteries. Keyless Entry System SmartKeys come with Keyless Go unlock or start your car even when you don't have the key. This is achieved by through a process known as passive entry and go. This is accomplished by a transponder integrated into each SmartKey that allows the vehicle to recognize the driver when it detects the key in close proximity. To turn on your car, the key sends low-frequency transmissions that are picked up by antennas both inside and outside your door handles. If the transmission matches the ID on the PASE module (Passive Access and Security electronics), the system authorizes the key to function as a passkey to operate the vehicle. These systems are designed for “replay attacks,” where a hacker could record and replay control signals to gain access to an automobile or building. To prevent this, a special algorithm ensures that each transmission transmitted by the key fob is distinct from the previous ones. This means that if a thief captures one of these transmissions, and then attempts to reuse it the car's PASE module will detect the attempt and block access.