From the evaporator???? Which does the air pass through first???

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89 300SEL Money Pit

92 Blown Buick Ultra Pimpmobile 220K and adding 1K per week

88 Wagoneer Slightly modified (Not for soccer moms)

04 Kia Sedona with every option... NICE

Evaporator first. That's how you get only unheated air to the front and rear center vents. Unless your center vent actuator is stuck open.

Sixto
95 S420
91 300SE
87 300SDL
83 300SD