BenzWorld R170 SLK Host
Date registered: Aug 2002
Vehicle: 2002 SLK32 AMG
Location: Chandler, AZ - USA
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I'm not sure what ideas you're looking for but:
If you want to know how to prevent the rust, you have to paint the steel with high-temp paint, or have them cadmium plated, etc.
If you want to know how to prevent the aluminum wheels from sticking to the hubs, you put a very thing coating of anti-seize compound on the machined surface before you install the wheel. This is the same stuff you use on spark plugs, etc.
If you want to know why they rusted to begin with, it's because they are dissimilar metals. Any spot where bare aluminum touches bare steel will rust if there's water around, including just humidity.
'02 SLK32 AMG, Firemist Red, Alpaca/Charcoal, K4, CD changer
'04 E320 Wagon, Capri Blue, Stone.