• Which mobile phones can I use in my new C-Class?

    The compatibility list provides detailed information on compatibility and functions available for different mobile phone models.
  • Are all mobile phones compatible with my Mercedes-Benz telephone system?

    Since Bluetooth has been defined as a standard, it cannot be guaranteed that all mobile phones are 100% compatible. For further details, please select your vehicle and then check the compatibility list to find out whether it includes your mobile phone and which functions are supported.
  • When and how can I find out whether my mobile phone is compatible with my Mercedes-Benz telephone system?

    New phones by different manufacturers are constantly being tested and added to the compatibility list. In most cases, these tests are concluded approximately 60 to 90 days after a new mobile phone has become available.
  • How do I connect my mobile phone via Bluetooth?

    Select your mobile phone from the compatibility list. Follow the information in the operating instructions for your mobile phone.
  • Why will my mobile phone not connect after entering the passkey?

    It’s possible that the passkey entered on your mobile phone is not identical with that of the head unit – or you took too long to enter the passkey. Please repeat the procedure by first selecting your mobile phone from the compatibility list. Follow the information in the operating instructions for your mobile phone.
  • My authorised mobile phone does not reconnect automatically with the phone system.

    Check on your mobile phone if another Bluetooth connection is already active and deactivate this connection. It may be necessary to restart your mobile phone.Some mobile phones require a confirmation prior to automatic connection. Check the settings on your mobile phone.Verify that your mobile phone is entered and authorised in the list of devices connected to your phone system. Follow the information in the operating instructions for your mobile phone selected from the compatibility list.
  • After completing a search procedure, my mobile phone does not appear in the phone system’s device list. Why is this?

  • What do I need to bear in mind when entering the passkey?

    All the information you need is provided in the operating instructions for your mobile phone selected from the compatibility list.
  • Is it possible to transfer phone numbers from my mobile phone to the phone system?

    Check in the function list for your mobile phone whether the functions “Send contacts” and “Import directory” are available. For details on transferring numbers, follow the information in the operating instructions for your mobile phone selected from the compatibility list.
  • Not all contact details for mobile phone entries are displayed in the phone system. Why is this?

    The volume limit for transferring or storing data can vary according to mobile phone.
  • Is there a speed dial function?

    Check in your mobile phone’s function list whether the “Speed dial” function is available. For details on transferring numbers, follow the information in the operating instructions for your mobile phone selected from the compatibility list. Depending on model, it’s possible to allocate numerical keys and stored phone numbers from your mobile phone. These are stored on the SIM card memory or device memory according to mobile phone.
  • I have set up a call but hear nothing via the vehicle loudspeaker. Why is this?

    Check the volume setting for the vehicle loudspeaker and adjust if necessary. Check the profile setting for the hands-free function on your mobile phone.
  • Can I transfer an ongoing call to the phone system when I get into the vehicle?

    Calls can be transferred (after a short delay) provided the phone system’s telephony function is active and your mobile phone is authorised.
  • Can I transfer an ongoing call to the mobile phone when I get out of the vehicle?

    Calls are cut off when the phone system is switched off. You can prevent this by selecting Private Mode on your mobile phone before switching off the phone system.
  • Why does the word “Unknown caller” appear in the display when there is an incoming call?

    Possible reasons for this:The caller has chosen to withhold his or her caller ID.Displaying the caller ID via the vehicle system is not supported by all mobile phones.Some network providers do not support caller ID in conjunction with certain features (e.g. toggle, hold).
  • The phone number but not the name of caller is shown in the display, even though the caller is stored on the mobile phone. Why is this?

    The caller’s number is not stored in the vehicle’s directory. Follow the information in the operating instructions for your mobile phone selected from the compatibility list for details on storing directory entries from your mobile phone.
  • Can more than one mobile phone be connected via Bluetooth at the same time?

    Only one mobile phone can be actively connected to the vehicle system via Bluetooth at any one time. If more than one Bluetooth mobile phone is available, you can switch between phones using the phone list stored in the vehicle system.
  • Is it possible to toggle between calls in the vehicle or set up a conference call?

    Both the toggle function and a conference call can be initiated via the mobile phone.
  • I am making a call on the vehicle system and want to accept an incoming call. Is this possible?

    A second call will be signalled in the display provided the “Call waiting” feature (not supported by all network providers) has been activated for the mobile phone. The second call be accepted or rejected. If you accept the second call, the first call will be cut off automatically.
  • Is it necessary to adjust the call volume on the phone system of my C-Class?

    To ensure optimum hands-free quality for your mobile phone, it may be necessary to adjust the volume level on the phone system of your C-Class. The optimum level appears in the function list for your mobile phone under the heading “Audio settings”. Follow the information in the operating instructions for your mobile phone selected from the compatibility list to implement these settings.
  • Why is the signal strength not displayed?

    This function is not supported by all mobile phones. Check in function list for your mobile phone whether the “Display signal strength” function is available.
  • The call lists for my mobile phone are not identical with the call lists on the phone system’s display. Why is this?

    The phone system display lists calls which have been received or dialled using your mobile phone during an active connection with the phone system. Calls not made during an active connection between phone system and mobile phone are not shown in the phone system’s call lists.
  • Why can't I use the head unit to send DTMF tones to select through some automated menus on my SIRIUS XM account? DTMF tones are created if a key (1-9, *,#) is pressed while a call is ongoing.

    Some phones may not process/send the DTMF tones via Bluetooth. Should this occur, DTMF tones can instead be selected using the Mobile Phone's keypad. Please observe State and Local laws regarding using Cell Phones while driving.
  • Why does the caller sometimes experience that parts of my words or sentences are missing or chopped?

    This behavior can happen under certain conditions when the driver and caller are speaking to each other simultaneously and it can also be related to the network if there are too many callers.
  • Why does the last dialed and received call list contain only one strange number?

    This behaviour can be related to the fact that the content protection is active. This can be set at a RIM/BlackBerry device also from your service provider if you have the enterprise activation.
  • Do all Bluetooth Phones work with the Mercedes-Benz phone system?

    Dieses Phänomen tritt unter bestimmten Umständen auf, wenn beide Gesprächsteilnehmer zeitgleich sprechen und bei dem Mobiltelefon bzw. im Netzwerk die Regelmechanismen dafür nicht richtig funktionieren. Dieses Phänomen kann auch bedingt sein durch eine hohe Auslastung der Zellen.
  • When and how would I find out whether a new phone is compatible to work with MB Bluetooth System?

    We continuously test most of the newly released phones from different manufacturers and service providers. A typical waiting period after a mobile is available is about 60-90 days to determine whether a phone is compatible with the MB Bluetooth system or not.
  • I was able to pair and use a Bluetooth phone with the MB phone system; however this phone was not on your compatible Bluetooth phone list, is this possible?

    It's possible that a phone which is not listed may successfully pair with the MB Bluetooth, however, the connection and hands-free reliability cannot be guaranteed by Mercedes-Benz and therefore we do not offer it as part of our compatible phone.
  • Why are the contacts of my Iphone not shown into my Mercedes-Benz phone system?

    Probably the sychronisation is deactivated. You will find this option at your IPhone under Settings, General, Bluetooth, select your Mercedes-Benz phone system (MB Bluetooth) and select "more" while activating the arrow. "Sync Contacts" has to be switched on.
  • Why is track information not displayed?

    Check whether the track information is shown on the phone itself. The phone also needs to support transmission of metadata. If possible, avoid using special characters in the track details.
  • Music playback does not start after connecting the phone.

    It may be necessary to start playback on the device itself or to start playback manually using the vehicle's system.
  • Music playback does not work properly (interruptions, distortions).

    This may be caused by the following: 1. The device is performing other operations and can therefore not transfer the music data correctly. Exit any other applications the phone is running. 2. Interference with other Bluetooth networks as well as W-LAN (WiFi) can impair playback. Please deactivate any W-LAN and other Bluetooth networks in your vicinity. 3. Your device is searching for other Bluetooth devices while playing music. Exit the Bluetooth menu in the device or deactivate the search for other devices.
  • Can I connect two Bluetooth devices (one for telephony and one for music playback)?

    Parallel operation is not possible. If a music player is connected via Bluetooth, you cannot use the handsfree facility for a phone.