my 97 sl500 (46,000 mi) started is doing some strange things. I was on a short drive when the right side warning lights came on, the analog gauges went down. Then when I came to a stop, the engine got a little rough. I went home and when I stopped in my driveway a strong bad odor occurred, almost like rotten eggs. I smelled it in the car and my wife,about 30 feet away, smelled it also. This car has been perfect until recently. Any help or thoughts would be greatly appreciated. Thanks.