I am puzzled and curious as to how the Electronic throttle works. I hope someone can shed some light on this for me. I have a 1993 300E 2.8 104 HFM motor with an ETA and no ASR. I have a throttle cable that appears to operate the butterfly opening on the ETA. How does the ETA set the throttle opening if the mechanical link is operating the throttle plate? Thanks for any insight. I would really like to understand the ETA better.

Bill

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87 560 SL
93 300E 2.8
91 300CE-24