When Benz added ASR to their cars , they decided to combine the cruise, throttle , and accelerator throttle position into one unit. I believe everything goes through the ASR computer and is out put to the throttle actuator , depending on the data that goes to the computer...accelerator down,throttle opens,wheel slip detected,throttle closes,cruise engaged speed maintained.I'm not sure of your configuration but I was able to remove the control rod between the electric throttle actuator and the throttle plate , adjust it and install it on the accelerator crank arm and throttle plate. This renders the cruise and the throttle portion of ASR inoperative but car otherwise drives normally.
Dan