That's a very valid point. However, this is really the only practical solution. Both the Benz dealer and Chrysler dealer said the bolt isn't available. The Benz dealer quoted me about $1,100 for a SuperCharger Repair Kit which includes the Clutch/Pulley, Belt, nose of the Supercharger. The Chrysler dealer only list the Supercharger as a complete assembly for about $5000. No way to get just a bolt. I'll take the gamble over spending $1,100. If my I lose the bet, I'll just have to buy a used Supercharger...

So far so good. I've had it on there since June and traveled about 4,000 miles with no issues. I've driven 1500 miles to the Dragon and Back including heavy beating for most of the weekend. It's been to the track several tmes and probably has 25 1/4 passes on it and countless 6,250 RPM blasts on the street. I've checked it 4 times to make sure it is tight and the pulley is properly aligned and positioned. Only time will tell.