Yes I did mean fishtailing.
The cost of the mercedes parts really makes you look at other ideas. I have been thinking that if my rear end breaks that I am going to get a srt8 215 mm setup. You can buy the whole thing set up with a lsd for 2,000 in almost any gear ratio. The getrag rear end for the srt8 is also an option. Some custom half axles and driveshaft and then you are basically unbreakable.