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klaus kallas · #4 08-31-2011, 09:05 PM

Thanks for the responses!! I am not getting any lights or codes through the odbII system (other than a long standing egr flow code). Have not checked the underhood diagnostics yet.

I did drive it home and experienced the surging for myself, however. Pressing down the cruise into the off position did seem to change things for a split second, but then would start acting up again.

Changed the engine wiring harness a few months back which looked like complete crap. Wonder if the throttle actuator wiring is toast as described in this write up http://www.benzworld.org/forums/w124-e-ce-d-td-class/1448549-how-rewire-m104-throttle-actuator.html

Does this sound like a logical next step? Luckily, mother-in-law was using our car for other reasons and this happened while it was here.