Wiring problems of the 2001 Mercedes Benz 320

One of the front headlight assembles of my 2001 mb e320 just stopped working. Upon inspection, I found that the wire insulation had vanished - simply disappeared - and there were bare wires coming in contact with each other. I tried wrapping the wire with electrical tape, and this worked for a while, but the light stopped working after a few weeks. This car was in a repair shop for a rear end collision recently, and the service manager noticed the problem. He said that he used to work for mercedes-benz, and that this was a common problem with the headlights. Apparently, it gets so hot that the wire insulation actually disintegrates and leaves the wires bare. And, even more surprisingly, sometimes the lights catch on fire. Of course, mb knows about the problem, but hasn't done anything to rectify their engineering mistakes - they're more than content to let their customers pay to have the light assembly replaced. And, for obvious reasons, they won't admit that there's a problem to begin with - a product recall would be terribly expensive. I find it difficult to believe that I'm the first one reporting this type of problem, and from what I've read on the internet, this type of wiring problem exists in other models across different model years. Time for mb to pay for their mistakes - not me. . . .