Syncing your Bluetooth to your Mercedes allows you to use your cell phone hands-free while driving. You can answer your phone using steering wheel controls and talk on the phone through the audio speakers. Using Bluetooth is a safer way to talk on the phone compared to driving with one hand while you hold your phone in the other (a manoeuvre that's illegal in some states). Your cell phone must have Bluetooth capabilities in order to sync it to your Mercedes.
Turn your car on, so that your in-dash screen turns on.
Move the cursor to select "Telephone" at the top of the screen. You will see other tabs around "Telephone," such as "Audio," "Navi," and "Video." Control the cursor by moving the selection device on the centre console.
Move the cursor to select "Data/Connections" in the bottom left corner. A menu will pop up once you click on the tab. Select "Bluetooth Telephones."
Select "Update." After you click on "Update," a window will pop up showing you that the car is searching for a Bluetooth phone. Make sure your phone's Bluetooth is enabled. Once the car finds your phone, you can connect it to the car. Depending on the type of Mercedes and cell phone you have, you may need to enter your Bluetooth's code. You will see a prompt on the screen if this is necessary. Once you have synced your phone to the car, the car will find your phone whenever you get in the car and the phone's Bluetooth is enabled.