The idle control valve is bolted to the intake, with two bolts and a two wire connector, and you should be able to find it, as it's in front of the fuel dist. (if you are looking at the engine from the front of the car).
My engine was flooding more than you could imagine, but don't take my word for it...as your dealership will give you some kind of answer soon.
Good luck.
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'87 300E | 2.6 engine
Artic White - Navy blue interior, chrome rims, very clean and sharp!
91 300E
89 300E
The rest of my collection are just cars and trucks...no more "automobiles"...