My 1989 Mercedes 560 sel, will start and idle fine until it warms up, then it stalls and will not restart until cool. If I rev it up to 3000 rpm it will run just fine. Could it be the fuel accumulator? Doesn't it apply back pressure to the fuel line? The heat of the engine causes it to expand and cut-off fuel?

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

Check fuel pump relay.
Check fuel pump control cirucuit.
Check fuel pump/

did those engine have trouble with plastic oilers for the cam?

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.

1991 Mercedes Benz 560SEL (126 Chassis) 5.6 liter SOHC V-8 (117)




Hope helps (remember rated this).

Not familiar with your Merc. This is general info. My porsche has a mecanical belt tensioner down low under the engine off the ground. Toyota has a spring charged piston pushing a belt tensioner wheel. Most other cars I've worked on had a pivoting alternator. If your car has a flat serpentive belt then it probaly has a spring loaded tensioner. If it has Vee belts then something sets the tension mechanically at install. Good luck!

hello, 560 sel,,,model 126.039 engine with v-8,engine number 117.968 ke is is fuel injection system.ref. book;technical data mb,ty

MAY REQUIRER THROTTLE BODY CLEAN UP,OR FUEL CLEANER IN THE SYSTEM...