have you looked at the KE control unit? Are the pumps still pumping when it dies? have you checked to see if the throttle plate is moving easily?

Let me know on those as there are still more items you can check.

Jonathan

__________________
Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
Follow Us on Facebook!
Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta