Comfort Roof Control Module for

  • Audi A3 Convertible
  • Audi A4/S4 (B6/B7) Convertible
  • Audi TT Roadster Model Year 2007
  • Volkswagen Golf 6 Cabrio
  • Lamborghini Gallardo Spyder


  • 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.
    This module is installed using the 3M wire taps very popular with 12V aftermarket industry for their reliability and durability. The most common problem during installation is a bad contact between the plugs from the supply wires and the wire taps. Please make absolutely sure that the metal blades of the plugs slide into the slots of the t-taps. It happens that the blade "misses" the slot and the connection looks correct, but doesn't make electrical contact!

    The T-taps come in RED (for thin wires), BLUE (for medium wires) and YELLOW (for thick wires).

    To test if you installed the module correctly after all wires are connected, turn the ignition fully on and watch the green LED on the module. It should blink (flash) to signal a correct installation. If the LED either does not turn on or stays on permanently, there is a bad contact or a missing connection! See detailed explanation of the DATA LED.
    Installation - Steps 1-3
    1. Open the convertible top all the way, lower all windows. IMPORTANT: Turn off ignition and pull key before continuing with the installation! Move both seats all the way forward and fold both backrests up. Behind the seats in the middle is the light module (1).
    2. Remove the light module as shown and unplug it.
    3. Remove the single torx screw in the left corner of the opening where the light module was.
    Installation - Steps 4-6
    4. Lift the entire back wall out by first pulling the sides toward the front of the car, then up. Make sure the 4 rubber grommets (1-4) stay attached to the wall, not the sockets in the car. If one is stuck there, pull it off and insert it here.
    5. Either in the middle (some model years) or slightly on the right (when looking down at the wiring) is the top control module. It is easily recognized by the three plugs. One black, one red and one yellow-ish one.
    6. Unplug the middle red connector (1) by pushing in the locking tab underneath it while pulling it out firmly.
    Installation - Steps 7-9
    7. Connect the red plug from the wiring harness to the control module (1), then connect the original red plug to the matching socket on the harness (make sure both click firmly into place). Open the little connection jumper (2) near the module plug and connect the SmartTOP module to the harness.
    8. Connect the power supply as follows. First attach the ring terminal of the supplied pigtail directly to a ground bolt (2), then connect the brown wire of the module harness to it. Next attach the supplied yellow power tap to the white wire on the left big black plug (may have a brown or red stripe on some models) using cobination pliers (1) and connect the red wire to the harness here. The green LED on the module should light up briefly to show that the module booted up. Reconnect the black connector to the top controller in case it was removed to attach the yellow power tap!
    9. Hit the unlock button on the remote just one time. The green DATA LED on the module should now turn on and flash regularly. This shows that the module is receiving data and is ready for use. Make sure the small jumper connection with the yellow wire (2) is OPEN! Otherwise remote operation will not work.
    Installation - Step 10
    10. Tuck the module nicely into any available space, use the velcro sticker to attach it. Optionally connect and run the USB cord down to the carpet behind one of the seats. This way a laptop can be connected later without the need to open up the back wall again. Reinstall the wall and configure the module according to our operation and programming manual.