starting problem with e55 amg
 

hi i have a problem with a 1999 e55amg after driving the car for a short while or on a long journey then parking the car up it then fails to restart it turns over like it wants to but does not fire up after waiting for say 5/10 mins the car will turn over first time it shows nothing is wrong when they plug the computer in to it any ideas as im pulling my hair out with this small problem