I have a 93 190e with the six in it.Now that summer is here & the air is on the car will stop when it is at a idle, not all the time but sometimes (like at a stop light at rush hour) the temp on car will be around mid temp on the gage.When it cools down around 5 min it will start back.Sometimes I have to hold the gas to the floor just to start it that's getting common on a cold start too.Would this have something to do with the fuel pump or vaccum? Thanks Scott

If it stops while running, it isn't vapor lock. Could be a fuel pump, monitor pressure during the event.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Thanks Steve.When I don't have the air on at night it does all right I have a fuel pump on it's way a mechanic back in spring told me the fuel pump may be faulty & losing pressure why it wont start when it's hot but why do I have to put it to the floor to start when it's cold?If I try to start it not putting pedal to floor it will start around 5 sec but sounds very sloppy but catches up with itself.Scott