Originally Posted by Doktor Bert

On the W116, the Evaporator Temperature Regulator sits atop the evaporator case. If you pull the glovebox and use a 90° carburetor adjustment tool with a stright-blade screwdriver bit on the end, you can dig through a spot in the felt cover and turn the screw a little.

It is NOT easy to do!!!!

I don't recall now which way I went, but 1/2 turn dropped the center vent temp from 44°F to 38°F.

I went back to the original setting because I felt it would result in less strain on the compressor...Robert