RadioChris123, I have the same controller in my VW bug, WDC-01-00039, only 9 units after yours! Anyway, today it quit on me in an intersection. There have been no recent issues. I came to a stop, was about to go, then when I pressed the throttle, nothing happened. I looked at the display (interface module) and it was saying system fault or whatever that standard error message is. I started to navigate with the arrows, then the display just went blank- nothing. I keyed off, then on, the 12v DC/DC was working (radio still on), but no start solenoid click, no go. Anyway, after my son came and towed me home I started diagnostics. I tried a new ethernet cable and can't get anything from the display. When I power off and reset the DC/DC and turn the key to ON position, there are no error lights on, but after 10 seconds the red LED comes on solid. It never flashes any error codes. It will not go into run mode when I turn the key to start. I can't find anything in the manual about this condition. Any one have any ideas where to start looking for problems? I don't know what would kill the interface like that, and why the controller won't flash codes, just has the steady red LED. Thanks for any help.