Strange...I had a 96 SL600 for a while and laid down Big smokey burnouts w/ out the AST cutting in on the fun:-/ Perhaps you can find the fuse and/or relay it goes through and pull it. I'm not the biggest fan of gadgets that cut in on the fun.
Bobterry99 is correct. From the owner's manual: "A portion of the ASR system remains active, even with the switch in the OFF position. If one drive wheel loses traction and begins to spin, the brake is applied until the wheel regains sufficient traction. The traction control engages at vehicle speeds up to approximately 24 mph and switches off at 50 mph."
VR43000, I'm not a tech and don't know about ASR. But interpreting the manual, I would say that switched OFF the ASR will engage if it detects wheelspin and the car is going 24 MPH or slower. Once engaged, it will remain so until traction has been regained or the car is exceeding 50 MPH. And like kn90d3 wrote, it won't affect the throttle and only affects brakes when it engages with the switch OFF.
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