I've seen some of thier Data logging with the phantom and it looks impressive, there are a couple people here that have them, but never really posted thier experience with it. MOre data can be found at MBworld.com as some have upgraded thier slk32's with the PhantomGrp.

if you want a real quaf LSD that will cost about $2800. and may require the use of a C32 or 55 mercedes rear diff. If you have a mercedes junkyard I've heard rumors about the station wagons with LSD, and maybe even the ML's?

I think I'll try the Phantom Grip first since it's so cheap and drops right in there. It looks like a similar design to the Powertracks except there are no lugs to engage.