I know more about the 600SL, however, I'd bet you have similar systems. Check the drivers front wheel speed sensor also check and see if you have a ASR switch integrated into the accelerator pedal. ASR or A$$ Reamer as we 600 pilots call it, has quite a few sensors to gather the decision information. Those are two frequently mentioned. I would still scope out the wiring at your throttle body to make sure. You never know when various materials were sourced. Worth a look !