Originally Posted by
GTR DRAGON
UPDATE: One of the cables to the positive side of the battery was sheared off, weirdest thing I've ever seen it was like a clean break

Is it possible that was a corrosion issue with that cable? I agree with getting a new complete cable from a genuine cable designed for the MB SLK-320 (which is about all parts with the drivetrain including electrical distribution and grounding. I have NEVER seen damage like this, another thought it could have been someone intentionally damaging the cable? My two older vehicles (2001 & 2002 Ford and Chevy) I would say OK to a clamping kit and a watchful eye over the months/years for corrosion BUT with these cars electrical systems components, they are way too sensitive to any electrical episodes. Good luck!
.