Take your old ECU out of the rain tray.
Remove it by removing the 2 screws and spacers.
Your "non-Cabriolet" ecu will have to be mounted upside down
in relation to your old controller. The spring lock is at the top, and the heat sink to the
rear.

Using one of the original long screws in the rear get a washer under the
head of the screw. Place it through the heat sink.

On the connector side locate where the hole should be and drill a "pilot" hole.
Using a sheet metal screw (1/2 to 3/4 a number 6 or


To reconnect it you will have to turn your connector 180 degrees, just do it carefully.
Done.