Comfort Roof Control Module for

  • BMW 4 Series/M4 Convertible (F33/F83)


  • Further information and manuals for all products can be found on our web site

    w w w . m o d s 4 c a r s . c o m

    We explicitly point out that all functions of this control unit should be used only while exercising caution and responsibility. We can NOT be held liable for any damage or injury caused by installing or using this product.
    Important Information. READ BEFORE INSTALLING!
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    If you run into any problems after installing the module, please go over the manual again in great detail, clicking every photo for full size!
    We now have a full Knowledge Base with Support Ticket system available online at

    If you need to contact us, the best and fastest way to do so is by opening a support ticket there

    This module comes with our USB Field Upgrade and Configuration Port! We recommend connecting it to a computer BEFORE YOU INSTALL and using our support app "m4cconnect" to do a quick firmware update check. M4cconnect as well as all other information regarding USB update and configuration can be found at You can even configure and activate your favorite module functions and settings on screen before the module is installed in the car! It is a good idea to permanently install the USB cable with the module in the car, leaving the computer plug in an easily accessible spot for later use with a Wifi/3G/4G connected laptop.

    If the top does not work properly or at all after installing the module, these tips can be very helpful:

    1) Turn Function 1 (Main Switch) off (Setting 0). The module will be completely passive. If the problem still persists and the top won't work, check all connections. Please also check the green DATA LED on the module!

    2) Function 2 now has a valet mode (Setting 2) on many modules. Valet mode completely disables opening of the top. Check the setting for function 2 and make sure the module is NOT in valet mode!

    IMPORTANT: Not all modules have the valet mode! Please check the Operation and Programming Manual!

    The DATA LED shows the module status and helps troubleshooting issues during installation:

    When the ignition is ON: The LED should BLINK (flash) in a regular pattern (about 1x per second). This indicates that the module is receiving data and should work OK.

    When the ignition is OFF: The LED should BLINK (flash) as long as the data bus is still active and turn off after a while (max 5 min) indicating that the car has entered stand-by (sleep) mode.

    If the LED is permanently lit with the ignition ON, the module is NOT receiving data from the top controller and all connectors should be checked.

    If the LED does NOT light up at all when turning the ignition ON, the module is either not getting power or not receiving ANY data. All connectors should be checked.
    Installation - Steps 1-3
    1. Begin with the roof closed, the car unlocked and the ignition OFF. Open the trunk (boot lid), retract the luggage divider tray and then lift up and remove the carpeted luggage floor.
    2. The convertible top controller module (1) is white and sits under the black metal brace, cradled in a foam carrier. There may be a BMW screwdriver (2) sitting in a hole in the foam carrier. Pull it out.
    3. Carefully pull the convertible top controller out as shown so that you can access the plugs. There are three plugs connected to the convertible top controller: remove the middle (black) plug by pushing in the small locking tab, and then moving the large lever over in the direction of the longer arrow.
    Installation - Steps 4-6
    4. Now the plug is unlocked, you can remove it from the convertible top controller. The supplied T-harness has an identical plug. Connect it to the convertible top controller. When connecting the plugs, insert them carefully ensuring the guides are lined up. These are zero insertion force connectors so they should slide together easily and without any force.
    5. Having attached the plug from the T-harness to the convertible top controller, connect the original plug to the matching socket on the T-harness. The black locking levers should snap back into place securing the connections. Check that each tab has engaged and that it holds the lever in place. Finally, connect the SmartTOP module to the 16-way connector on the T-harness. Tap the unlock button on your remote key fob once and the green data LED should now blink, indicating that the module is ready for use. Refer to the Operation and Programming manual to configure the SmartTop module.
    6. IMPORTANT: To avoid overheating the SmartTOP module, try to place it in an open, hollow space (1). Avoid mounting it anywhere close to the audio amplifier (2), if present. Also do not mount it on top of the roof controller (3) itself. It is equipped with an overtemperature shutoff. If the module gets too hot, top operation is not possible and an error message may be shown on the dash.