1st Apr 2016, 18:04
I bought a 99 SLS, it would die without warning at various speeds. After much testing and cussing, it turned out to be the security within the switch. It was telling the system the car had been stolen and would shut it down. Fixed the switch and had the car reprogrammed. That was two years ago. No more problem and I'm still driving this car. 228,000 miles on it now.
25th Jul 2014, 23:02
Had the same or similar problem, and changed my crankshaft sensor and did a lot of troubleshooting to find out that all I had to do was replace the ignition switch. It is a 20 dollar part and should take no more than an hour and a half. There are a few tricks to removing it, like holding the brake down when pulling a particular cord out. Can't remember specifically, but you can figure out if you try. Good luck.