In a brochure I have for the GE combo, it cites as a feature an automatic water level control. It says something like after assuring a minimum safe fill, the machine will fill with enough water to accommodate the load. What that means to me is that it fills to a certain level no matter how much or how little water the load absorbs. I wonder what would happen if one was loaded with those little compressed sponges that really absorb water.
Any machine that terminates the fill by itself could be said to have an automatic water level control. "Adjustable" is another term entirely. The early AM models were singularly inflexible in not having an adjustable water level. Once Maytag came out with the adjustability feature, they offered a kit to bring the feature to older AM models. Kenmores and WPs had a portion of the wash cycle bracketed with the term "FILL" and if you wanted less than a full fill, you pulled out the timer dial, turned it past the 10 minute mark and pushed it back in so it would agitate at less than a full fill level. Timed fill machines could be set to a shorter fill period, but the Maytag was a full tub fill washer, unless you taped the lid button when it had filled enough and stayed near to undo it for the rinse fill, but I don't remember Maytag offering that suggestion. Of course, CU stated that the AMP had the smallest usable capacity of any of the top loaders tested in the report (5 pounds of dry laundry) so maybe a partial fill provision was not needed. Something tells me that somehow they must have been able to see the wash action or inaction to make that determination.