If both lights went out at the same time, I'd guess that the problem is a faulty dimmer rheostat. I know on older models, the rheostat can be replaced by a piece of wire, which will provide full illumination at all times... this is one of the first repairs/modifications I did when I got my 240D, and I've been very happy with it.

Nate

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1985 300DT, Classic White, California, 175K
1984 300TD, Classic White, Euro, 285K


"When nine hundred years old you reach, look as good you will not. Hmm?" - Yoda