the ABS is an easy DIY, however in order to remove it you will have to jack it up in order to remove the front left wing cover to get access to some of the screws that holds it in place. Then send the unit to matt@cheap-abs.com and he'll fix it.
This.
And, although not advisable, the car can be driven with the ABS module removed...
2003 RS6 l SE Exhaust l Koni Yellow Sports w/stock springs l Lowered 1"F 1.25"R l EPL Tuned l 19 x 9.5 VMR V713 & 265 PSS's l 50% window tint l Protective film on entire hood, bumper and front quarter panels l