I'll try again. Look very carefully at the wire where it is joined to the connector. In mine, the copper wire portion was broken inside the insulation, just before the connector. Looked intact but wasn't. I think its a silicon based insulation to accommodate the heat from the cigar lighter, and with mine, the wire was secured to the connector with the insulation. In other words, even though it appeared to be intact, the copper wire had fatiqued within the insulation and was not making contact. Check the voltage at the female portion of the cigar lighter. If you don't own a voltmeter, get one of the 12v dc to 120v ac converts and see if that works when you plug it in. Remember, the car must be on to get power to the cigar lighters.

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1995 E320 -171k-km
1995 S420 -333k-km