Check your spark after car stalls. Pull one of the spark plug wires to check. Be careful though use plyers with good isolation so you wont get shock. (it happens to me all the time) Hold it like 1/2 inch away from engine block or any good ground. It you have spark then check fuel. I had many cars. Im like street mechanic so I had cars with stalling problems and the way i was checking for fuel on the street is to crank it couple of times car wont start but there will be strong fuel smell out the exhaust. If you cant tell for sure then youll need to take off main fuel line off fuel pressure regulator put it in the bucket and put car into ignition (dont start) and see if fuel flows.
You defenatly have one of these problems because your car doesnt have complicated fuel injection system. I would check spark and fuel and take it further after those tests done. Good luck

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1999 ML430 Silver 135k ml
Smoked LED taillights, Alpine in-dash DVD player, 12" sub, Pioneer components, 2 amps, 4200k HIDs, ML55 headlights, 20" rims, mirror LED blinkers

SOLD. 1996 E320 145k ml. Burgundy

SOLD but miss it everyday 1992 500sel Black
Chime buzzer mod,Alpine CD/MP3 player with stock amp,Euro headlights,S600 grill,20" rims, BEST CAR EVER!

SOLD. 1990 300E White
187k ml,smoked tails,Euro headlights,17rims,Intake,12" sub in first aid kit,alarm/autostart,buzzer mod