Hi everybody,

I would like to know if the air necessary to the engine at idle is going only through Idle control valve or though throttle body?

Is throttle flap completely closed at idle? or slighty open to allow some air to go to engine?

Engine is M103 on 260E 1988 euro

Thanks for your help
I like to know how things work

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Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km

Son's one: GLK class, 220CDI, 2009, W204

Sold: E-class 260E, 1988, W124, Wonderfull car sold after 489 000 kilometres of reliable services (engine M103, clutch, brake system and 5 speed manual gear box all original).

Sold: E-class, 320CDI, W210, 2000, 225 000km