Chrysler 300 M, goes out while driving

Hi everybody and nice Whitsun, I hope that maybe someone is here in the nice weather. Yesterday my 300m 2.7l went out during the ride. Stand there in the roundabout, maybe 5 minutes later again jumped and so 5km drove and then went out again in a slight curve. The same, had just set up the warning cross and tried again, jumped again and fortunately came the 3km to home. Then I tried in the evening, there he is even This morning the ADAC came and there he came the first time. The ADAC couldn’t help either, meant, maybe the needle hangs from the tank indicator, which is too little fuel in it, because it turned out in curves? But the needle is not even on reserve? Yesterday I also did not drive so far that the engine would be really warm. Where it happened the car stood before 2 hours and until it was out for the first time, are not even 2km. I was looking for chon in the net, but there really comes everything from engine damage to crankshaft sensor. Maybe still important, there was also no warning light before or after and I then turned off the radio, the engine runs also calmly. Oil and that’s what is in it. A colleague said, could also be the ignition lock? Oh so, the ADAC could not read out error, because the year 1999 is and since there was not yet the plugs? I am afraid that he will again in impossible place n stops and calls my workshop after Pentecost, but is also a freeman and not Chrysler, but he has already had the car there, maybe you have an idea, what I can say to him then? Or someone has had the problem before? Would you be very grateful!!!!! Greetings and nice weather enjoy Micha