Putting a remote start on a car with manual transmission is a royal pain and quite expensive. I have it in the Honda, if you want the remote start to work you have to go through a little song and dance during shutdown:
- apply brake,
- wiggle shifter in neutral gate,
- pull e-brake,
- wait for relay click,
- push green button on remote,
- wait for headlight flashing with relay click,
- take key out of ignition, get out of car,
- lock car with remote).
If you don't do these steps in exactly that order, it won't start (everything designed to keep the car from driving off with a kid inside or running down some pedestrians while in gear without the e-brake on).
Nothing like getting into a cold-soaked car. Left the jetta at the airport for a couple of days. 10deg when I got in. First 30seconds sounded like something was being ground up inside and the DSG kept binding and working against its 'P' stop.