Renault Megane 1.4 16V BJ 2000 engine started while driving

Hello, I’ve been smart in this forum for a long time as a visitor/guest, if my Megane had a few little problems. So thank you for the many suggestions Now I have a new problem with my old friend and I hope you can help me. So it’s a Renault Megane with a 1.4 16V engine (95 hp) from the year 2000 and a mileage of about 134,000 km. Recently during the ride the engine went without The starter had turned at the start attempts, but he turned very fast. One might think that he had no “load” on it. We then towed the car and the next day we looked at it again. With new start attempts the starter did not turn any more, you can only hear a loud “crack” as soon as you want to start the engine. So far I have unfortunately not quite found I have often read about problems with the electrical system, unfortunately there was nothing in the error memory (ODB2). I have to check the spark plugs and ignition coils, but at the moment I have the fear that the timing belt might have been torn. However, this one was renewed by us about 2 years ago and has not yet been on it for 30,000 km. Can this still be on the timing belt? How does it look with warranty (we have the one in a Have your workshop changed)? Or what could I even look for? Thank you very much!!!