Check out Jim's pages. Pull the codes (a search will yield a lot of info, including how to build your own reader) Basic codes you can get w/o a reader, by using the pushbutton and the LED.
Don't bother complaining to MB about defective wiring in the harness and the ETA - they know nothing about it (yeah, right).

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D