I have a Cobra alarm on my RS. Some times when i press the button to arm the system and lock the doors the passenger door open again. I have noticed it is also doing this when i use the lock button on the door, so its not an issue with the alarm.

Any ideas?

Any other issues with the door electrics? Courtesy light, puddle light, speaker, mirror (adjust or heater) or window controls not working correctly?

No everything is working ok apart from the passenger door not locking sometimes