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Q: Had new transmissions and control module w/new wire harness replaced... on 2001 Mercedes-Benz C320

My car is still losing speed and drops back down about 30...What is going on.. Had so many parts replaced and really need help to resolve this issues.. Dealership said it was "a" part in the transmission but would tell my mechanic what .. so my mechanic put another transmisson along with above parts and still is having the same issue... Any advice ??
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check previous post. tranny shops are specialists. they have more thorough testing and trouble shooting methods.
Yes, AAmco couldn't figure it out... Here are the codes P0720 and P0600 that are still appearing .. If anyone can help or have suggestions, please reply..Thanks
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