1. Contact a Mercedes Benz dealership or authorized service center:
- Provide your vehicle's VIN (Vehicle Identification Number) and proof of ownership.
2. Confirm key compatibility:
- Ensure that the key you're ordering is compatible with your specific vehicle model and year.
3. Provide identification:
- You may need to provide additional identification documents, such as a driver's license or passport.
4. Place the order:
- Specify the type of key you need (standard or valet).
5. Programming and cutting:
- The key may need to be programmed and cut to match your vehicle's immobilizer system. This usually requires specialized equipment and software.
6. Obtain the key:
- Once the key is ready, you can pick it up from the dealership or service center.
7. Verify functionality:
- Test the new key to ensure that it works properly in the ignition and doors.
It's important to work with a reputable and authorized Mercedes Benz dealership or service center to ensure the proper functioning of the additional key. They will have the necessary expertise and tools to handle the programming and cutting of the key.