I'm trying to program a Dover T4 car to park with its doors open. There are no parameters that I can find to make this happen. I've checked all car and group parameters, csw, job parameters. What am I missing, is this feature not a field programmable option?

The standard software does not allow this. The best you can do is extend the door time to 60 seconds if you use the Homing feature. I would think that if custom software was on that job the feature would have been activated already. Good luck.