The lack of dash and climate control lights could be as simple as rotating the reostat knob on the face of the speedo cluster. This same knob is depressed to reset the tripometer or turned left/right to dim/brighten the dash illumination. They tend to corrode and no longer pass current. Try rotating it 4 or 5 times back and forth to see if illumination returns.

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.