Engine Shut Off Without Warning problems of the 2010 Jaguar XF

2010 Jaguar xkr (note that your form later only allows an Xf to be clicked in order to proceed so I did that). On 2-21-10 car 1/2 full of gas. Started car and drove two blocks when suddenly the engine shutoff and amber engine symbol ("engine malfunction") light came on. Able to move steering wheel a little (no power steering) and coasted to stop--doing about 30 miles per hour when the engine suddenly and without warning shut off. Waited a couple of minutes and tried to start and would not restart. Tried to start again a minute later and was able to start and drove back to home where car was then towed to dealership. Austin jag dealership said they found low fuel pressure code, but when pressure tested they found nothing and couldn't replicate. Then towed to houston Jaguar dealership where purchased from and they said they couldn't find anything wrong and could not replicate so said nothing to repair. Occurrence in austin, TX (houston garaged). Previously, two weeks before, smelled gas in car when filled up (again dealership couldn't smell or find a problem).