There was only 2 wires going to the blower assy on both my 560 and 300 & yes the Push button unit is working since I swapped them from car to car. I looked at the strip fuse which looks ok but I will actually remove it from the box and look at it closer.

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6