After flat battery may have to leave Ignition switch on for up to 20 minutes before immobilizer will reset. Note immobilizer LED might flash and go out once reset, car should then start.
If the battery in the intelligent keyless entry remote goes flat or you are in a area of heavy radio(ports, supermarket car parks etc.) interference hold the remote control next to the start button the car should then start.
Note there is an emergency key in the remote, you can insert it in the door handle once you have clip off the plastic cover to unlock the car
Intelligent keyless entry system will go to sleep if left for 2 weeks, to save the battery going flat, just press button on remote to wake up car.
Keyless entry, if parked with wheels turned or against kerb etc. You may have to rock steering wheel or turn against load on tyres as engine is started to allow steering lock to disengage.