Typical story: new VRS TDI, hard ride, loud knocking, looked behind shock gaiters to find these... 3 from each front shock. My Q is, are there any blocks to be found on the back? Thought I could feel something behind the rear gaiters but they're cable-tied in place and I don't want to go cutting things open (lease car). I've also seen conflicting reports of whether any are ever used on the rear? Don't want a wasted trip back to the dealers if there aren't any ever installed. Thanks