I searched but most threads seem to just dead end with no actual results. Both my memory seats do not work. Buttons are not stuck and one set I recently cleaned. So I am pretty sure that with at least one its not the switches being sticky.

So how do they work? The seats operate fine (well except the passenger side which burns up the control board if forward/back is used for more than a second). Anyway. I press the green followed by a number within 3 seconds. Then I wait, adjust the seat and press a button (or hold a button down, manual is not clear) but nothing happens with either.

Do they have independent computers to control the memory function. And if so, is it the big black box under each? One of which I have repaired a few times . And while I am on the topic, what the heck is the bright yellow box under the driver side blocking the under-seat vent?

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car