Car stops without warning
I have a Mercedes Benz SLK 1999. It occasionally stops without warning. All the lights come on but absolutely nothing happens. If I leave it for 10 minutes it then starts first time. The car has been to the Mercedes garage and another one, no problems can be found. I had a whole year without problems after changing the spark plugs oil filter and petrol filter, also changed the crank sensor. Has anyone got any other suggestions as to the cause and remedy ??