Phantom Oil Light

In a 1990 300E 2.6. The oil light comes on every time I make a left turn and ONLY when I make left turns. The oil pressure gauge reads normal, and the oil level is perfect. what the heck is going on?

While I'm on the topic of crazy problems, listen to this. The left headlight doesn't work. I put a new bulb (9004), nothing. Checked fuses, nothing. wiring looks good. I see nothing that would cause this. The car hase never been wrecked, in fact the car is like new with the exception that the light does not work. Do these cars have lamp control modules like BMW? Could this be the problem?

thanks
- Blizzak454