One item that takes a lot of blame is the OVP - overvoltage protection relay. There was once a photo of it at the parts site here, but I see it's no longer available - the photo that is.

On my car(same motor as yours), it's located back around the false fire wall, midway across. A couple of small bolts hold it in. There's one or maybe 2 blade fuses in the top of it.

With engine off, remove it and shake it, being sure to hold the small flap down. If you hear rattling, replace it. I had an intermittent stalling issue that was resolved with the replacement of this part after it flunked the shake test.

It's also quite possible the duty cycle needs to be adjusted on your car. Steve Bortherton has an article in the DIY section and if you search on things like "duty cycle" and "EHA", you'll come up with enough stuff to keep you busy for quite awhile.

Old, hardened vacuum hoses could also be an issue.

There's no silver bullet for this issue - too many things that can cause intermittent stalling.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"