My 300e (before evap ruptured) was putting out 38 degree air through the center vents while driving. at idle, it would go closer to 45-50 r134.

My w126 300se puts out 34 degree air out of the center vents, and at idle barely goes above 40. r12 refrigerant.

This would be at 80 degrees ambient.

Even at 100 degree days, the 300se would still put out 38-40 degree air at speed. At idle, it would suffer a bit.

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2