I recently purchased a 1983 300D with about 148k miles. There are a couple items that don't work, but I'll limit this post to the most critical. On the dashboard, the oil pressure indicator is at zero and does not move at all. I am reluctant to drive the car until I can find out if it is a faulty guage or if there is in fact no oil pressure. Any ideas?
(The other items that don't work are the tachometer and the cigarette lighter)