3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
I recently purchased an 89 E30 with a stock radio (for a short time) in it and would like to know how to adjust the bass & treble. After pressing the mode button, I don't know how to adjust from there.
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