Ignition problems R5

Hello everyone, I hope I’m right here, even if R5 is not on the list. To make it short. I have a stainless R5, born 1986, standing in front of the door. But the box brings me to despair. About 4 weeks ago I drove nonstop over 600 km by car. At the destination arrived, car parked, drank a coffee and then wanted to drive into a pub. I arrived about 5 km then the engine just stops. After about an hour vain try to get a taxi, ZΓΌ The next day, he went to a Renault workshop to inspect. New candles, oil filters, oil. It was found that all the lights had been burned in the entire rear area. For this reason, there was a cable break between tailgate and chassis. All the trucks were replaced. I lead home. So back the 600 km. But made a stop at a stop. When I wanted to start again, he didn’t jump on. I decided that I would have a coffee for the time being. The remaining 200 km took the car without any problems. Arrived back home, parked and the next morning he immediately jumped on again. In the following time the distances that I can put back became shorter and shorter. After consultation with the Renault workshop I have the OT-Geber, alternator (light flickered) and today the ignition coil (the complete ignition box was too expensive for me) against new parts. cht. Well, after today’s ignition coil change he just ran about 1km. Then he turned off without a reason and without a noise (as always). Like someone turned the ignition key. Who knows advice. Gruss Popokatepedel