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I am in the same situation, I have two systems that are showing "not ready", an O2 and the Evap system. I took it to my local STAR station mechanic who pretty much only works on German cars. Here is what he told me to do;
1) Disconnect the negative battery cable
2) Short the negative to the positive terminal
3) Hold it there for 30-45 seconds, this essentially "zero's out" the modules.
4) Drive the car for at least 100 miles, "then come back to see me."
I did this the other day, still have to drive that 100 miles though, but when I do I'll let you know the results.
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