My 560SL has been in the shop for 2 weeks and they can't find the problem. Sometimes at low speed ( under 20mph ) it will just quit as if I turned off the ignition. Usually it will start right back up, but last time I turned it off for about 1 minute, it finally started after a 20 minute wait. It turns over normally, but it doesn't even try to fire. It has never happened when I've been going 35 mph or more and I'm guessing at the under 20 mph, but it is only at slow speed or stopped at a light. When it starts back it runs great. It is not time or distance related as it might go several days without incident. There is no warning such as a miss or stumble. When it starts back up its as though nothing ever happened. Perfectly normal until the next time it decides to stop.
Any thoughts will be appreciated. The shop that has it only works on Mercedes, and so far they can't locate the problem.
Tom