First of all, the check engine light came on at 80,000 miles in my 1993 300 E. OK, I replaced the Oxygen Sensor unit and all was well. Now, at 100,000, it has come on again. Mpg is great, runs great...how do I read the code without spending big bucks?

Second, Over the past few months several things happened intermittantly, but always together. Most of these are on one fuse and the symptoms make me think something is going to ground somewhere. I would loose my central locking system, my stereo quit and read E2, the interior light serviced by the door jam switch stayed on, and the fasten steat belt light blinked. Usually these quit after a day or two, but now it's all the time. Any ideas?