Quote:
Originally Posted by ctaylor738
I think all 114/115 cars with factory air had the two blowers and the vacuum acivated change-over controlled by the AC knob. The vacuum also positions the flaps for AC. The compressor does not come on until you engage the fan.
The mechanism can be seen on the left side of the console by the dash.
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This would apply to a '75 240D.
As for the '68 220D, If it has factory AC, my factory Service Manual for Series 114-115, dated May 1970, does show a first-version heat/AC control with a rotary AC temp control and a separate console-mounted manually-operated, horizontal lever, above the radio, to change from the AC mode & fan to heater mode & fan. I remember seeing that setup on a '69 230 and a '70 250, so it appears the vacuum-operated fan change-over started with the '71 models.
Happy Motoring, Mark