## How to Program a Mercedes-Benz Car Key to Start Engine
Introduction
Mercedes-Benz vehicles are known for their luxury, performance, and advanced technology. As a result, their key fobs are also sophisticated and packed with features. However, if your Mercedes-Benz car key is lost, stolen, or damaged, you will need to know how to program a new key to start your engine. This guide will provide step-by-step instructions on how to program a Mercedes-Benz car key to start your engine.
Materials Required
* New Mercedes-Benz car key
* Mercedes-Benz STAR Diagnosis tool (optional)
* Laptop or tablet with Mercedes-Benz Xentry software (optional)
Step-by-Step Instructions
**1. Insert the Original Key into the Ignition**
Locate the ignition cylinder and insert the original key. Turn the key to the “ON” position but do not start the engine.
**2. Wait for the Security Light to Flash**
After a few seconds, the security light on your dashboard will begin to flash. This indicates that the car is ready to program a new key. If the light does not flash, you may need to insert a different key that has been programmed to the vehicle.
**3. Remove the Original Key and Insert the New Key**
Once the security light is flashing, remove the original key from the ignition and insert the new key. Turn the new key to the “ON” position but do not start the engine.
**4. Wait for the Security Light to Go Out**
The security light will continue to flash for a few seconds before it goes out. This indicates that the new key has been programmed to the vehicle.
**5. Start the Engine**
Once the security light goes out, turn the new key to the “START” position to start the engine. The car should start and run normally.
Programming a Mercedes-Benz Car Key Using STAR Diagnosis or Xentry
If you have access to a Mercedes-Benz STAR Diagnosis tool or a laptop or tablet with Mercedes-Benz Xentry software, you can program a new key using the following steps:
1. Connect the STAR Diagnosis tool or Xentry software to the vehicle’s OBD-II port.
2. Select the “Control Units” option.
3. Locate the “Anti-Theft” control module.
4. Select the “Adaptations” option.
5. Follow the on-screen instructions to program the new key.
Tips
* If you are unable to program the new key using the steps provided, you may need to take your vehicle to a Mercedes-Benz dealership or certified mechanic.
* It is important to keep your car keys in a safe and secure place. If your keys are lost or stolen, you will need to purchase a new set of keys and program them to the vehicle.
* Mercedes-Benz recommends that you have at least two programmed keys for your vehicle. This will ensure that you always have a backup key in case one is lost or damaged.
