Yes, be sure of what you think you are seeing. If it is really a bad cable, then jumpering around that cable should fix the problem. That would be a good test if possible. If it is truly a bad cable then it is likely a bad crimp at one end. This would be pretty unusual for Mercedes in my experience.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra