I think I would check the crank sensor to make sure the bolt is tight and also the fuel pump output during the failure.

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

I DON'T KNOW IF YOU FIXED YOUR PROBLEM YET, BUT THE THROTTLE ACTUATOR TRANSMITS ALOT OF FUNCTIONS. IDLE SPEED,CRUISE CONTROL,ACCELERATOR, SAFETY FUEL SHUT OFF & OTHER THING. IT DOES NOT SET A CODE FOR STALLING.