My son started this particular ball rolling when he said that I could supercharge The Beast. CLK 350 is fairly quick anyway but I headed off into Google as you do. A Danish company called Kleemann makes the supercharger and there are a few UK people who can do the job. It looks like it will cost around £7 - 8K and will give me somewhere in the vicinity of 400bhp at some point in the rev range. The car has the AMG sports pack and will probably not run into the nearest tree. Apart from the insurance hike and the risk to my licence, what else do I need to consider? Stronger pistons, better brakes, new tyres every 5,000 miles? Sectioning myself under the Mental Health Act?