when cold,hard to start and cruise control wont go on. Next startup is easy and

ONCE I KILL THE ENGINE (SAY AT THE DEALER) AND HE RESTARTS THE ENGINE, EVERYTHING WORKS PERFECTLY. tHE DEALER KEPT THE CAR FOR SEVERAL DAYS AND WAS NOT ABLE TO REPRODUCE THE PROBLEM. hOWEVER I LIVE IN A LITTLE COLDER ENVIRONMENT SO A FEW DAYS LATER. IT HAPPENED AGAIN; I RAN THE CAR AFEW MINUTES, KILLED THE ENGINE AND RESTARTED--- THEN IT WORKED PERFECTLY AGAIN!