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How to Program a MERCEDES Truck Key If you require replacement of the battery or your key isn't functioning our parts department will be glad to assist you. Keep in mind that replacement keys must be purchased and synchronized at the dealership in person. This is done to ensure your vehicle's safety and security. The Key Lab is only requested by you or a person authorized to do so. Keys There have been some claims that you can reprogram the Mercedes key, but this isn't the case. The key is programmed “for life” and once it's programmed for one vehicle, it cannot be used with another. The beam of metal on the key has a distinct profile that the Mercedes system detects and only recognizes. A new key for the Mercedes truck is of a different form and won't work with the system. The dealer will have to obtain from Mercedes an additional key that is compatible with your vehicle. They don't keep keys in stock at the parts department. When picking up your key, you will require the original title, registration number, and an official driver's license, passport or identification card. This will help verify that you are the owner of the vehicle and not a person who is trying to steal it. If you have an authorized representative or delegate who picks up the keys for you They must provide all of the above documentation and a signed and dated letter of authorization from the owner. The authorized representative or delegate must also bring the car to the dealership to get the keys. Contact the dealer if you have any concerns. They'll be glad to help. They will inform you whether they have the key in stock or if they need to order from Mercedes for a fresh key that is compatible with your vehicle. Remotes In some MERCEDES vehicles the remote key comes with a touch screen that displays virtual buttons. When the remote key is touched, infrared signals are sent to devices that control them. A graphical interface software program can be used to program the screen. The “buttons”, which appear on the screen, are actually representations of electronic circuit components. These include resistors (resistors) and capacitors (inductors), potentiometers (potentiometers) and transistors (diodes) integrated circuits & switches, and diodes. It can be difficult to open the door of your truck if you've locked your keys inside the boot. This is due to the lock door and cylinder of the Mercedes-Benz may be damaged. Try using a rope with the slip knot to tie the lock cylinder and pull it open, but this isn't a foolproof method. You may need try it several times, or even contact a locksmith or roadside assistance service to help open the truck without damaging it. The lower case has a panel that can be removed to store the batteries. The panel is lighter brown in color and has white writing indicating the type of batteries to be used (UM-4/AAA). It also has an Plus sign and a Minus sign to indicate which direction the battery spring coils should be positioned when installing the batteries. Keyless Entry System SmartKeys with Keyless Go unlock or start your car even when you don't have the key. This is accomplished by with a technique known as passive entry and go. The SmartKeys contain a transponder that enables the vehicle's computer to detect a driver by detecting the key's proximity. To activate your vehicle, the key transmits low-frequency transmissions that are picked up by 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 to gain access to an vehicle or building. To avoid this, a special algorithm ensures that every transmission transmitted by the key fob is distinct from previous ones. The PASE module in the car will detect if a thief attempts to record one of these transmissions and then attempt to reuse it.