I have a 90 300sl the engine shut off sporadically anytime. I took it in to a independent mercedes shop with over 20 years experience to back up their job, and they couldn't trace the problem. I left the car to them for 2 weeks to find the cure for the problem and know luck. I am very sad and shock. They want me to change what they thought it was and it didn't solve the problem. I don't mind fixing what it takes to solve the problem but it seems that they are guessing. Here's the problem, the engine runs excellent and strong like new. Whether cruising high speeds or parking at a stop light, the engine shuts off anytime it wants. Starting it up is easy and no problem. Has anyone had this problem and can you please suggest what it might be because I don,t want to sell it. This is sad for me because my honda never gives me this type of problem ever and nevertheless, a Mercedes-Benz, the worlds best car, I think not. Please help.