People who always made complaints about traction problems have the chance to get a 30% limited slip differential directly from AMG for their CLK55, E55 and SL55.
I also heard that it is available (on request) for the C32 but I'm not sure about it.
As far as I heard this option also includes a different ESP setup and a new manual program setup for the Speedshift automatic tranny.
Install takes about 2-3 days at AMG, cost for the E55 is over 5000 EUR including install and tax.

Install has to be done at AMG directly, US customers have to bring their registered car to Germany to have the job done.
No other possibility.