89 300e dies after 15-20 minutes
 

89 300e starts and runs fine for 15 minutes. After this warm up time the engine shuts down- feels like fuel starvation
Local mercedes shop ran it and replaced fuel pump relay. Tested it and 20 minutes later-same problem. MB terchs say they don't know what the problem is.After 10 days at MB, I drove car home(almost) as it died again 20 minutes down road. Will not start wheen engine hot, sit overnight and will run for 20 minutes max.
HELP!!!

That why I don't bring my car to the dealer anymore. If it ain't got OBDii they don't have clue.

I would guess your car is enriching the mixture for warm up the way its supposed too but as soon as the car warms up it cuts out. Did they even bother checking your fuel pump? Or fuel pressure at warm up? What is up with these people?