YOU ARE IN LUCK! I just went through this on a car...I spent two days on the same problem and, after talking with two of the other techs on this board, fixed it! (Thanks to DOC, and BROTHERTON!)

You will need to monitor the fuel plate sensor. It WILL stall the car! It is located just under the fuel distributor to the front side of the engine. It has 3 wire connected. If the signal goes open for a split second, the controller will turn off the idle speed system..This causes the stall. Also it will change the amperage to the EHA. This causes problems.

The thing you can do is remove the sensor (MARK FIRST!) Then clean only the sensor portion with a clean pencil eraser. Reinstall and see if it helps.

If not, you will have to replace.

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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS