I need to check the part numbers of my fuel distributor and EHA etc. I know its underneath the air filter assembly, which I need to remove. How do I go about doing it? Yesterday I took off the cover and removed the filter to look at the assembly but didn't see any screws/bolts holding the
assembly down to the engine. Is it held in place by friction
of the rubber piece connecting the metal assembly to the intake of the mass air flow meter that's on the fuel distributor?

I forgot to mention the car is 1987 260E 2.6L

There are three 10mm nuts...two on the engine side and one underneath on the outside.

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2012 E350
2006 Callaway SC560

The one on the side is mounted sideways, and it is on the fender side, underneath.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280