Quote:
Originally Posted by Jeremy5848
Ah, you have a different system, possibly ACC-I or -II. My '85 300D-T had an ACC-III system so there is no sliding control like yours. I am not informed of how that system works so I can't advise you.
Jeremy
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on both my 77 240D and 81 240D there is a horizontal sliding knob under the vents with an arrow on it,it seems to turn them on and off, but im not really sure, since i dont know if my system is working how its supposed to

i would assume the OP's 79 240D would be similar to mine