I recently purchased a 2012 VW passat automatic, all was going well until something strange happened today. I had parked in a car park to take a phonecall, put the car in park, turned off ignition but the key was still in the ignition. About 10 mins later the engine started up by itself, I didn't touch anything, my feet were not on any pedals, would anyone know what might cause this,? I haven't had an automatic prior to this but I don't imagine it's normal for this to happen. Any thoughts on the cause, thanks?