i have a 500sel euro in the my shop right now with somewhat of the problem except for this one has a superior mind of its own.Here's all the situations it does. 1) starts, idles fine for a minute or two, idle raises, it tries to recover itself sometimes but in the long run it just dies without any hesitation.2)car starts and within seconds dies.3)while driving it stalls at all stopping points.

Done the following.
checked ovp, idle control computer, idle control valve, tried new coil, plug wires are new as is the fuel pump relay.

If there is anyone with a little help or have seen this before i would GREATLY appreciate it.