hi all im new to this forum and need some help on my current issues i have a clk 230 komp convertable and whats happening is 2-3 times a day it feels as if the super charge turns of n the car drives very sluggish and if i carry on driving like it it starts to stutter as soon as i turn it of n back on its ok for an 40 min to an hour problem 2 when i come to slow down just as i stop i get a thump from behind like its dropping back into gear any help much appreciated