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How to Program a MERCEDES Truck Key Whether you need to replace the battery or your key isn't working, our parts department will be willing to assist you. Please note that replacement keys must be purchased and synchronized in person at the dealership. This is to ensure the security and safety of your vehicle. Only you or a person authorized by you may make an appointment for this service. Keys Some people have claimed that you can change the programming of your Mercedes key. This is not true. Once paired, the key cannot be used with any other vehicle. The key has a specific profile in its beam of metal and the Mercedes system scans for this and only recognizes the specific key. A new blank key from Mercedes has a different design and won't work with the system. click through the up coming document will need to order from Mercedes a new key that is compatible with your vehicle. They do not keep keys in stock in the parts department. You'll need the original title or registration and a driver's license, identity card, or passport to present when picking the key. This helps confirm that the person who has the key is the owner and not someone trying to steal the vehicle. If you have an authorized representative or delegate pick up the keys on your behalf, they will need to provide all the above documents along with the signed and dated proof of authorization from the owner. The authorized representative or delegates must also bring the car to the dealership to pick up the keys. Contact the dealer if you have any concerns. They will be happy to help. They will inform you whether they already have the key or whether Mercedes requires an alternative key that is compatible with the vehicle. Remotes In certain MERCEDES models, the remote key has a touch-screen that shows virtual buttons. When the remote key is pressed the infrared signals are transmitted to control devices. The screen can be programmed by using an interface program that is graphically designed on the user's computer. The “buttons” on the screen are actually images that represent components of an electronic circuit. These include capacitors, resistors inductors, potentiometers diodes, transistors integrated circuits and switches. If you place your keys in the boot, it can 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, but it's not a foolproof method. You may have to try several times before calling an expert locksmith or roadside assistance service to help open the truck without damage. The lower case is equipped with an opening panel that is able to be opened to store the batteries. The panel is light brown and is white with writing that indicates the type of batteries that are recommended (UM-4/AAA). The panel also has a Minus and Plus sign indents that indicate which direction to place the spring coils of the battery. Keyless Entry System By using a technique known as passive entry and go, SmartKeys with Keyless Go can open or start your vehicle even when the key isn't inside. This is done by a transponder integrated into each SmartKey that allows the vehicle to recognize the driver when it detects the key in close proximity. The key transmits low-frequency signals that are picked up both inside and outside of the door handles. If the transmission matches the ID number on the PASE module (Passive Access and Security electronics) the system allows the key to function as a passkey for operating the vehicle. These systems are intended for “replay attacks,” where a hacker could record and replay control signals to gain access to an vehicle or building. To stop this from happening, a specially designed algorithm ensures that every transmission that is sent by the keyfob will be distinct from previous ones. This means that if a thief records one of these transmissions and attempts to use it again the car's PASE program will be alerted and block access.