I pulled up to the drive thru last week, the cooling fan kicked on, it was embarassing...noisy, vibration, etc...
Went to Lane Automotive and purchased a Spal 16 inch puller fan, model # SPA30100231 $98.00 If you cut the 4 arms that hold the original fan and motor flush with the rest of the shroud, the Spal will set right in the shroud like it was made for it. I used 4 machine screws with lockwashers to mount it. It looks like it came from the factory with it.
Spal fans are original equipment on Mercedes and BMW's are ultra balanced, have a low power draw and move about twice as much air as the stock fan.
Lane Automotive is a national distributor for performance parts supplying Drag Racers, Circle Track Racers, Hot Rodders etc. They will UPS anywhere. Their number is 616-463-LANE.
The new fan runs about half as long as the old one, has no vibration and barely moves the voltmeter when it kicks on.
The best part is it looks like it is factory installed.