According to an MB internal memo, all 2005 S430 and S500 sedans can be specced with 4MATIC at no additional cost. 4MATIC was optioned on 30 percent of 2004 S-Class vehicles and uses a 40/60 front/rear torque split and a center differential to give individual wheels traction during adverse conditions. 4MATIC has long been a pricey option on the MB order sheet, but this move surely presages a future of standard AWD on all S-Classes, a development that will probably force the hands of other luxury sedan manufacturers. Except of course for Audi, who mimed an exaggerated yawning motion upon hearing the news. Audi themselves will now be offering vinyl roofs at no extra cost just to piss Cadillac off.