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How to Program a MERCEDES Truck Key Our parts department is here to assist you, no matter if you require replacement of a battery or your key no longer functions. Be aware that replacement keys must be ordered and synchronized at the dealership in person. This is to ensure the safety and security of your vehicle. Only you or a person authorised by you can make an appointment for this service. Keys There are rumors that you can reprogram the Mercedes key, but this isn't the case. The key is paired “for for the rest of time” and once it's programmed to one vehicle, it cannot be used with another. The key has a specific shape in its beam of metal and the Mercedes system looks for this and only recognizes that particular key. A new blank MERCEDES truck key is of a different form and will not be compatible with the system. The dealership must obtain a new, compatible key for your vehicle from Mercedes; they don't keep them on hand at the parts department. MAN truck key 'll need the original title or registration and a driver's license, passport, or identity card to show when you pick the key. This will help verify that you are the owner of the vehicle and not someone who is trying to steal it. If you have an authorized representative or delegate pick up the keys on your behalf, they will need to supply all of the above documents and an official and dated letter of authorization from the owner. The authorized representative or delegate must also bring the vehicle into the dealership to pick up the keys. Contact the dealer if have any concerns. They'll be glad to assist. They will let you know whether they already have the key or the Mercedes requires an alternative key that is compatible with the vehicle. Remotes In some MERCEDES models the remote key comes with touchscreen that shows virtual buttons. When a button is pressed it transmits infrared signals to control devices. The screen can be programmed with a graphical interface program on the user's computer. The “buttons” on the screen are actually images that represent the components of an electronic circuit. They include capacitors, resistors, inductors, potentiometers, transistors, diodes, integrated circuits and switches. If you put your keys in the boot, it may be difficult to get them out of the truck without damaging the door and the Mercedes-Benz lock cylinder. You can try using a rope tied with a slip knot to hook the lock cylinder and then pull it open however this isn't a sure-fire method. You may have try it several times before calling a locksmith or roadside assistance service to help you open the truck without damage. The lower level case features an opening panel that can be opened in order to store the batteries. The panel is a light brown color and has white writing to indicate the type of battery that are recommended (UM-4/AAA). It also features the Plus and Minus sign to indicate which direction the coils of the battery should be placed when installing the batteries. Keyless Entry System SmartKeys come with Keyless Go unlock or start your car even if you don't have the key. This is achieved by with a technique known as passive entry and go. This is accomplished through a transponder built into each SmartKey, which lets the vehicle recognize the driver when it detects the key is within a certain distance. To turn on your vehicle, the key transmits low-frequency signals that are picked up by antennas in and around your door handles. If the transmission matches the ID on the PASE module (Passive Access & Security Electronics) the system will allow that the key function as a passkey for operating the vehicle. These systems are designed to ward off “replay attacks” which allow hackers to record and replay the control signals and then use them to gain access to a vehicle or building. To prevent this the system uses a special algorithm that ensures that every transmission that is sent by the keyfob will be different from the previous ones. The PASE module inside the car will be able to detect the attempts of a burglar to record one of these transmissions, and then attempt to reuse it.