I'm starting to doubt if this car has one based on search results. Does it have one and if so how may I clean it?

On a side note I found a guide to remove and clean the throttle housing. But it makes no mention of what appear to be AC lines to the fuel distributor. I assume it best to leave those connected and just move the distributor asside?

Thanks much!

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car