1989 mercedes 560 sel, gas/will start and idle fine for 10 min. then stall and not restart. Today I started it and let it idle for 5 min. then brought it up to 3000 rpm and it ran with no probs. let o

at rear of engine ,flywheel 5mm allen key or 10mm socket

the idle control motor probly worn-on the throttlbody--also the tps sensor - get intake area inspectd--a haynes manual will xplain complete car-partstore hazit--------starter fluid is used for low compression or weak spark

gas or diesel..

catalytic converter is clogged basically its stopping up your exhaust. Over time the pressure will slowly vent out, allowing your car to start, only to build up the backpressure again, stalling engine.

Classic example of a clogged catalytic converter! I bet it will restart after two hours as well.

Engine stalls or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

It sounds like a idle switch on the carbie easy to replace

My first guess would be the fuel pump. Alot of defective pumps will operate until they warm up.

could be the tranny, those sick-ose mess with everyone

I believe this stalling problem is caused by the fuel accumulator