I think you may have missed my "PS" comment. The factory roll bars are adequate with NASA. I have driven with the top up at both Thunderhill and Infineon (Sears Point). In fact, I've even driven top down once at Thunderhill and no one said anything. Before even attempting to enter the event, I had several conversations with the organizers to ensure I could drive the SLK without modification. It was approved well in advance... something that can not be said of the Corvette converts.
BTW, it has been my experience that top up works best at it provided a little more rear downforce. By contrast, top down seems to work best at an Autocross where speeds are relatively low.
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SOLD!
06 Mercedes Benz SLK55
Caspian Blue / Black & Ash
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