Let me remind you that any sort of tampering with Catalytic converters is prohibited by law and would render your vehicle illegal for the street. Plus, you would be spewing unnecessary amounts of NOx, Hydrocarbons that really arent good for man nor environment.

As others have said, there really isnt any gain in removal of the cats and the car would have baffling and possibly incorrigible side-effects as well as loss of torque. If you want to do exhaust tuning on a MB you must realize that there is very little to gain as it is tuned out by the factory. If you want to tune your car; I would recommend perhaps a Kleeman supercharger or a more aggressive tire package.