C5 Automatic Wont Start

[Guest lynndavs]

took battery out of key fob to take it to shop in the mean time my husband tried to start the car not knowing i had taken batterys out. the car tried to turn over twice then went dead.put new battery in fob car will not start.i had the rac out they dont know the problem

[Johndouglas]

Does the dash board light up when the key is turned to the first position?

[coastline taxis]

Resync your key by putting it in the ignition barrel then put ignition on and hold the lock button down on the key fob for 10 seconds. then remove key lock the the car with the key fob then try as normal to start the car