Yes, that's it. Technically, I believe it is actually an Air Mass Meter, or AMM. I should also report that, after installing a new AMM and fuel pressure regulator, the car runs wonderfully smooth, all the way up to redline. It still has that turbo boost effect at 3500 RPM, but I understand now this is normal, and it has grown on me.

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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