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How to Program a MERCEDES Truck Key Whether you need to replace the battery or your key has stopped working the parts department is happy to help you out. Please note that replacement keys must be ordered and synchronized in person at the dealership. This is to ensure the safety of your vehicle and security. Only you or a person authorized by you can request this service. Keys Some people have claimed that you can reprogram your Mercedes key. This is not factual. The key is paired “for life” and once it's programmed to one vehicle, it won't work with another. The beam of metal on the key has an exclusive shape that the Mercedes system detects and only recognizes. A new blank MERCEDES truck key is a different shape and will not work with the system. The dealer will have to obtain from Mercedes the new key that is compatible with your vehicle. They do not have keys in stock at the parts department. You'll need the original title or registration and driver's license, passport, or identity card to present when picking the key. This will help verify that you are the owner of the vehicle and not a person who is trying to steal it. If you would like to have a representative or delegate take the keys for you, you will require all the documentation above and an authorized letter dated by the owner. The authorized representative or delegates must also bring the car into the dealership in order to retrieve the keys. Contact the dealer if have any questions. They are happy to assist. They will inform you whether they have the key available or if you need to make an appointment with Mercedes to receive a new, compatible key for your vehicle. Remotes In some MERCEDES models the remote key is equipped with an interactive touch screen that shows virtual buttons. When a button on the remote key is touched it sends infrared signals to control devices. A graphical interface program can be used to program the screen. spare truck key on the screen are actually images that represent the components of an electronic circuit. These comprise resistors (resistors) as well as capacitors (inductors) as well as potentiometers (potentiometers) and transistors (diodes) integrated circuits & switches, and diodes. If you place your keys in the boot, it may be difficult to get them out of the truck without damaging the door or the Mercedes-Benz lock cylinder. It is possible to use a rope that has a slip-knot that you can use to tie the lock and pull it out however, this isn't 100% secure. You may need try it several times or even call an expert locksmith or roadside assistance service to help open the truck without damage. The lower level case has a panel that can be opened to store the batteries. The panel is lighter brown in color and is white with writing that indicates the type of batteries that should be used (UM-4/AAA). The panel also features the Minus and Plus indents that indicate which direction to install the battery spring coils. Keyless Entry System SmartKeys come with Keyless Go unlock or start your car even when you don't have the key. This is accomplished by through a process known as passive entry and go. This is accomplished by a transponder integrated into each SmartKey that lets the vehicle recognize the driver if it detects the key within close range. To start your vehicle, the key transmits low-frequency transmissions which are picked up by the antennas inside and outside your door handles. If the transmission matches the ID on the PASE module (Passive Access and Security Electronics) the system will allow that the key to act as a passkey to operate the vehicle. These systems are designed for “replay attacks,” where a hacker could record and replay control signals in order to gain access to an automobile or building. To prevent this the risk, a specific algorithm makes sure that every transmission transmitted by the key fob is distinct from the previous ones. The PASE module inside the car can detect if a thief attempts to record one of these transmissions and then attempt to reuse it.