There are so many different parts that come together and make up your Mercedes vehicle as a whole. You have exterior body parts, interior body parts, and all of the components that hold everything together. There are locks located in various places on your vehicle. These are able to be open and shut with a key or with the push of a button. The door locks on your vehicle are important parts that you want to ensure are working properly so you can secure your vehicle and open it when needed. There are different parts that make up the door locks and a range of hardware. The door lock cylinders are tumblers used to lock and unlock the doors. These are more common on older model vehicles, while there are door lock actuators on modern varieties. These are found on cars with power door locks. Whatever the case, it's important to have the right hardware to keep the locks working. You can find OEM locks and hardware here on our site for your Mercedes.