Comfort Roof Control Module for

  • Audi A3 (8V)


  • 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!
    This manual is designed to produce completely filled pages. In order to get best print results, simply set the borders to minimum settings in the browser's page setup menu and disable headers and footers.

    Activate the print preview and if necessary decrease the zoom level until all pages are shown correctly.

    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. Fully close the convertible top and turn the ignition fully off. Open the trunk and remove the floor board. The seat release (1) and the strapdown bracket (2) need to be removed next.
    2. Lift the handle up and pull the locking rivet out, then the whole piece easily comes out.
    3. Use a T30 (in some cases T40 or T50) Torx bit to remove the screw inside the strapdown bracket.
    Installation - Steps 4-6
    4. Lift up the plastic back cover by pulling straight up with some force. It is simply snapped in place.
    5. Fold the whole coverpiece towards the center to access the top controller behind it.
    6. Another view of the coverpiece being bent out of the way. It is not necessary to remove any other screws or completely uninstall the cover.
    Installation - Steps 7-9
    7. View from underneath. Find the top controller box with a yellow, red and black connector going to it. The yellow plug (1) and the big black plug (2) will need to be removed.
    8. Disconnect the two plugs by pushing hard on the locking levers on the side (unlatch). Connect the Mods4cars custom wiring harness in between, make sure all connectors latch securely.
    9. Connect the new yellow plug (1) and the new black plug (2) to the top unit, connect the smartTOP module to the harness and stow it (3) in the adjacent hollow space. Best connect and install the USB cable for later firmware updates or module configuration. Put everything back together. Remember to configure the module according to our Operation and Programming Manual.