On the AM commute: Ambient temp of 77. I noticed 4-5 degrees improvement in the A/C output with slightly lower engine temp on the gauge. When I got to traffic near the office, the engine temp climbed slightly but the vent temp stayed the same. It's pretty much behaving like I suspected. Will report more after the drive home. Should hit low to mid 90's today.
Oh, and the shroud in question is in front of the radiator.

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1983 M-B 240D-Gone too.
1976 M-B 300D-Departed.

"Good" is the worst enemy of "Great".