I may have found a reasonably priced supercharger kit for the Crossfire.

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SLK320 SC.jpg

The system will fit under the stock Crossfire engine cover which is very stealthy.

The entire kit cost 4,000 Euros but this may include VAT. Without VAT it would be about 18% less. I have sent them an email requesting more information. They sell this same kit for the Crossfire and just about every Mercedes that has the 3.2 engine.

SC crossfire.jpg

Crossfire-SKPlus-with stock engine cover.jpg