general problems of the 2007 Buick Lacrosse

While driving on the highway in the rain, my headlights went out. I was terrified. Turning the switch on and off would not fix the problem. I took the car to the dealership. They said they could not duplicate the problem and would not fix it. I had taken the car to the dealership shortly after purchase in 2009 and had complained of leaking seal on the top edge of the driver's side door in the rain. Water would drip all over my left arm, shoulder and arm rest. They said they could not duplicate the problem and would not fix it. Now the headlights will refuse to work on an intermittent basis. The dealership will not fix it. The dash reads headlights suggested but they will not come on. I can use the dimmer on the steering column and the bright lights will work, but driving with bright lights into oncoming traffic is dangerous. I need to have a dealer fix this problem. I took the car through a car wash for the first time the other day and the lights have been acting up again. Please have someone contact me and authorize repairs at the dealership. I am afraid to drive even a short distance at night not knowing when my headlights will suddenly go out again. It has happened several times now. It really scares me and concerns me that a dealership would not repair the problem. Updated 09/10/lj the consumer also stated there was a noise coming from the steering, a squeaking noise coming from the dash area, and water would drip through the top door, every time it rained. Also, there was a vibration issue, so the dealer replaced the tires, but it didn't resolve the issue.